examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
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function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
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btn.textContent = 'Copy';
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btn.onmouseover = function() { this.style.opacity = '1'; };
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btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
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};
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observer.observe(document.body, { childList: true, subtree: true });
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var __m = "github.com";
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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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Emergency override progress: 0/5
These approvals do not satisfy normal or CODEOWNER requirements because the commit identity is unverified.
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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🟡 Heimdall Review Status

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These approvals do not satisfy normal or CODEOWNER requirements because the commit identity is unverified.
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } 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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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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🟡 Heimdall Review Status

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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🟡 Heimdall Review Status

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These approvals do not satisfy normal or CODEOWNER requirements because the commit identity is unverified.
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

Description

Tests

Checklist

A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
@cb-heimdall

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🟡 Heimdall Review Status

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Reviews 🟡 0/1
Emergency override progress: 0/5
These approvals do not satisfy normal or CODEOWNER requirements because the commit identity is unverified.
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examples: x402 buy loop with an opt-in merona pre-payment seller check - #1464

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jywy78kgrf-create:feat/x402-merona-guard-example
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examples: x402 buy loop with an opt-in merona pre-payment seller check#1464
jywy78kgrf-create wants to merge 1 commit into
coinbase:mainfrom
jywy78kgrf-create:feat/x402-merona-guard-example

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Self-contained example (no changes to agentkit core). Composes the existing x402ActionProvider actions with a small example-local action provider: make_http_request -> check_x402_seller -> retry_http_request_with_x402.

check_x402_seller calls merona's free, keyless trust API via the published merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict; the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks). No dependency added to agentkit core.

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A couple of things to include in your PR for completeness:

  • Added documentation to all relevant README.md files
  • Added a changelog entry

Self-contained example (no changes to agentkit core). Composes the existing
x402ActionProvider actions with a small example-local action provider:
make_http_request -> check_x402_seller -> retry_http_request_with_x402.
check_x402_seller calls merona's free, keyless trust API via the published
merona-guard npm package and returns a recorded-fact PASS/FAIL/UNCERTAIN verdict;
the agent does not pay on FAIL. Fail-soft (unreachable => UNCERTAIN, never blocks).
No dependency added to agentkit core.
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@github-actionsgithub-actionsBot added documentation Improvements or additions to documentation example New example agent typescript labels Aug 25, 2026
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