feat(v9/core): add MCP server instrumentation#17196

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Merged
AbhiPrasad merged 1 commit into from
Jul 29, 2025
Merged

feat(v9/core): add MCP server instrumentation #17196

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2 changes: 2 additions & 0 deletions dev-packages/e2e-tests/test-applications/node-express/src/app.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down
2 changes: 1 addition & 1 deletion dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
const sessionId = req.query.sessionId;
const transport = transports[sessionId as string];
if (transport) {
await transport.handlePostMessage(req, res);
await transport.handlePostMessage(req, res, req.body);
} else {
res.status(400).send('No transport found for sessionId');
}
Expand Down
14 changes: 7 additions & 7 deletions dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
expect(errorEvent.exception?.values).toHaveLength(1);
expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

expect(errorEvent.request).toEqual({
expect(errorEvent.request).toMatchObject({
method: 'GET',
cookies: {},
headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
const doRequest = async (id: number) => {
const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
return response.json();
}
const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
expect(response1.message).toBe('This is an exception withMonitor: 1')
expect(response2.message).toBe('This is an exception withMonitor: 2')
expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
};
const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
expect(response1.message).toBe('This is an exception withMonitor: 1');
expect(response2.message).toBe('This is an exception withMonitor: 2');
expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});
18 changes: 12 additions & 6 deletions dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
return transactionEvent.transaction === 'POST /messages';
});
const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
return transactionEvent.transaction === 'mcp-server/tool:echo';
return transactionEvent.transaction === 'tools/call echo';
});

const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

const postTransaction = await postTransactionPromise;
expect(postTransaction).toBeDefined();
expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

const toolTransaction = await toolTransactionPromise;
expect(toolTransaction).toBeDefined();

expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
// TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
});

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
return transactionEvent.transaction === 'POST /messages';
});
const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
return transactionEvent.transaction === 'mcp-server/resource:echo';
return transactionEvent.transaction === 'resources/read echo://foobar';
});

const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

const postTransaction = await postTransactionPromise;
expect(postTransaction).toBeDefined();
expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

const resourceTransaction = await resourceTransactionPromise;
expect(resourceTransaction).toBeDefined();

expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
// TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
});

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
return transactionEvent.transaction === 'POST /messages';
});
const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
return transactionEvent.transaction === 'mcp-server/prompt:echo';
return transactionEvent.transaction === 'prompts/get echo';
});

const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

const postTransaction = await postTransactionPromise;
expect(postTransaction).toBeDefined();
expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

const promptTransaction = await promptTransactionPromise;
expect(promptTransaction).toBeDefined();

expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
// TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
});
});
2 changes: 1 addition & 1 deletion packages/core/src/index.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
feat(v9/core): add MCP server instrumentation#17196

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Sign in
to your account

 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
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Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
feat(v9/core): add MCP server instrumentation#17196

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Sign in
to your account

 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
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Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(v9/core): add MCP server instrumentation#17196

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 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
Loading
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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feat(v9/core): add MCP server instrumentation#17196

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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Already on GitHub?
Sign in
to your account

 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
Loading
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(v9/core): add MCP server instrumentation#17196

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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to your account

 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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feat(v9/core): add MCP server instrumentation#17196

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 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
Loading
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
feat(v9/core): add MCP server instrumentation#17196

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Merged

AbhiPrasad
merged 1 commit into

from

Jul 29, 2025
 Merged


feat(v9/core): add MCP server instrumentation
#17196
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2 changes: 2 additions & 0 deletions
dev-packages/e2e-tests/test-applications/node-express/src/app.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -25,6 +25,8 @@ import { mcpRouter } from './mcp';
const app = express();
const port = 3030;

app.use(express.json());

app.use(mcpRouter);

app.get('/crash-in-with-monitor/:id', async (req, res) => {
Expand Down

2 changes: 1 addition & 1 deletion
dev-packages/e2e-tests/test-applications/node-express/src/mcp.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -55,7 +55,7 @@ mcpRouter.post('/messages', async (req, res) => {
 const sessionId = req.query.sessionId;
 const transport = transports[sessionId as string];
 if (transport) {
 await transport.handlePostMessage(req, res);
 await transport.handlePostMessage(req, res, req.body);
 } else {
 res.status(400).send('No transport found for sessionId');
 }
Expand Down

14 changes: 7 additions & 7 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/errors.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -13,7 +13,7 @@ test('Sends correct error event', async ({ baseURL }) => {
 expect(errorEvent.exception?.values).toHaveLength(1);
 expect(errorEvent.exception?.values?.[0]?.value).toBe('This is an exception with id 123');

 expect(errorEvent.request).toEqual({
 expect(errorEvent.request).toMatchObject({
 method: 'GET',
 cookies: {},
 headers: expect.any(Object),
Expand DownExpand Up@@ -43,11 +43,11 @@ test('Should record caught exceptions with local variable', async ({ baseURL })

test('To not crash app from withMonitor', async ({ baseURL }) => {
 const doRequest = async (id: number) => {
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`)
 const response = await fetch(`${baseURL}/crash-in-with-monitor/${id}`);
 return response.json();
 }
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)])
 expect(response1.message).toBe('This is an exception withMonitor: 1')
 expect(response2.message).toBe('This is an exception withMonitor: 2')
 expect(response1.pid).toBe(response2.pid) //Just to double-check, TBS
 };
 const [response1, response2] = await Promise.all([doRequest(1), doRequest(2)]);
 expect(response1.message).toBe('This is an exception withMonitor: 1');
 expect(response2.message).toBe('This is an exception withMonitor: 2');
 expect(response1.pid).toBe(response2.pid); //Just to double-check, TBS
});

18 changes: 12 additions & 6 deletions
dev-packages/e2e-tests/test-applications/node-express/tests/mcp.test.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -18,7 +18,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const toolTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/tool:echo';
 return transactionEvent.transaction === 'tools/call echo';
 });

 const toolResult = await client.callTool({
Expand All@@ -39,10 +39,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const toolTransaction = await toolTransactionPromise;
 expect(toolTransaction).toBeDefined();

 expect(toolTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(toolTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('tools/call');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -51,7 +53,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const resourceTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/resource:echo';
 return transactionEvent.transaction === 'resources/read echo://foobar';
 });

 const resourceResult = await client.readResource({
Expand All@@ -64,10 +66,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const resourceTransaction = await resourceTransactionPromise;
 expect(resourceTransaction).toBeDefined();

 expect(resourceTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(resourceTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('resources/read');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });

Expand All@@ -76,7 +80,7 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {
 return transactionEvent.transaction === 'POST /messages';
 });
 const promptTransactionPromise = waitForTransaction('node-express', transactionEvent => {
 return transactionEvent.transaction === 'mcp-server/prompt:echo';
 return transactionEvent.transaction === 'prompts/get echo';
 });

 const promptResult = await client.getPrompt({
Expand All@@ -100,10 +104,12 @@ test('Should record transactions for mcp handlers', async ({ baseURL }) => {

 const postTransaction = await postTransactionPromise;
 expect(postTransaction).toBeDefined();
 expect(postTransaction.contexts?.trace?.op).toEqual('http.server');

 const promptTransaction = await promptTransactionPromise;
 expect(promptTransaction).toBeDefined();

 expect(promptTransaction.contexts?.trace?.op).toEqual('mcp.server');
 expect(promptTransaction.contexts?.trace?.data?.['mcp.method.name']).toEqual('prompts/get');
 // TODO: When https://github.com/modelcontextprotocol/typescript-sdk/pull/358 is released check for trace id equality between the post transaction and the handler transaction
 });
});

2 changes: 1 addition & 1 deletion
packages/core/src/index.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -118,7 +118,7 @@ export { featureFlagsIntegration, type FeatureFlagsIntegration } from './integra
export { profiler } from './profiling';
export { instrumentFetchRequest } from './fetch';
export { trpcMiddleware } from './trpc';
export { wrapMcpServerWithSentry } from './mcp-server';
export { wrapMcpServerWithSentry } from './integrations/mcp-server';
export { captureFeedback } from './feedback';
export type { ReportDialogOptions } from './report-dialog';
export { _INTERNAL_captureLog, _INTERNAL_flushLogsBuffer, _INTERNAL_captureSerializedLog } from './logs/exports';
Expand Down
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