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5 changes: 5 additions & 0 deletions .changeset/dcr-deprecation-citation.md
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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.
6 changes: 4 additions & 2 deletions docs/migration/upgrade-to-v2.md
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Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
`ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
`RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
[modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down
15 changes: 11 additions & 4 deletions packages/client/src/client/auth.ts
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
* consistently across both DCR and the subsequent authorization request.
*
* @deprecated Dynamic Client Registration is deprecated as of protocol version
* 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
* Remains functional during the deprecation window (at least twelve months).
* Prefer a CIMD URL `client_id` when the authorization server advertises
* `client_id_metadata_document_supported`; the SDK already gates on this for you.
* 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
* landed via spec PR
* {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
* (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
* functional during the deprecation window — at least twelve months under the
* feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
* removal date. Prefer a CIMD URL `client_id` when the authorization server
* advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
* skips registration for you when that capability is advertised AND your
* provider supplies `clientMetadataUrl`, but `registerClient` itself does not
* gate — calling it directly always sends the registration request.
*/
export async function registerClient(
authorizationServerUrl: string | URL,
Expand Down
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function addCopyButtons() {
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docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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5 changes: 5 additions & 0 deletions
.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
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var __re = new RegExp('^' + ".*" + '
docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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5 changes: 5 additions & 0 deletions
.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
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var ref = document.referrer;
var terms = [];
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
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var __re = new RegExp('^' + ".*" + '
docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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docs(client): correct the registerClient deprecation citation to spec PR #2858#2729

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5 changes: 5 additions & 0 deletions
.changeset/dcr-deprecation-citation.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
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try {
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docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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docs(client): correct the registerClient deprecation citation to spec PR #2858#2729

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5 changes: 5 additions & 0 deletions
.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

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Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

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Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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})();
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
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docs(client): correct the registerClient deprecation citation to spec PR #2858#2729

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.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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(function() {
var enabled = true;
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if (!enabled) return;
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if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
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filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
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docs(client): correct the registerClient deprecation citation to spec PR #2858 by claude[bot] · Pull Request #2729 · modelcontextprotocol/typescript-sdk · GitHub
Skip to content
docs(client): correct the registerClient deprecation citation to spec PR #2858#2729

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#2729
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5 changes: 5 additions & 0 deletions
.changeset/dcr-deprecation-citation.md

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
---
'@modelcontextprotocol/client': patch
---

Correct the `registerClient` `@deprecated` notice: Dynamic Client Registration was deprecated by spec PR modelcontextprotocol#2858 (Client ID Metadata Documents), not SEP-2577 (which deprecates roots, sampling, and logging). The notice now also names the earliest possible removal date under the feature lifecycle policy (2027-07-28) and clarifies that the `client_id_metadata_document_supported` gating lives in the built-in `auth()` flow — `registerClient` called directly always sends the registration request. Documentation only; no runtime behavior change.

6 changes: 4 additions & 2 deletions
docs/migration/upgrade-to-v2.md

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -484,8 +484,10 @@ instead.
 `ToolChoice`, `ToolUseContent`/`ToolResultContent`, the `includeContext` enum values),
 and the full Roots stack (`Root`, `ListRootsRequest`/`Result`,
 `RootsListChangedNotification`).
- **`registerClient`** (Dynamic Client Registration) — prefer Client ID Metadata
 Documents per SEP-991.
- **`registerClient`** (Dynamic Client Registration) — deprecated via spec PR
 [modelcontextprotocol#2858](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858)
 rather than SEP-2577 (listed here because the `@deprecated` annotations landed in
 the same sweep); prefer Client ID Metadata Documents per SEP-991.

The deprecation is annotation-only — JSDoc `@deprecated` markers were added, nothing
else: every deprecated runtime API keeps its v1 call signature (e.g.
Expand Down

15 changes: 11 additions & 4 deletions
packages/client/src/client/auth.ts

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -2359,10 +2359,17 @@ export async function fetchToken(
 * consistently across both DCR and the subsequent authorization request.
 *
 * @deprecated Dynamic Client Registration is deprecated as of protocol version
 * 2026-07-28 (SEP-2577) in favor of Client ID Metadata Documents (SEP-991).
 * Remains functional during the deprecation window (at least twelve months).
 * Prefer a CIMD URL `client_id` when the authorization server advertises
 * `client_id_metadata_document_supported`; the SDK already gates on this for you.
 * 2026-07-28 in favor of Client ID Metadata Documents (SEP-991); the deprecation
 * landed via spec PR
 * {@link https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2858 | modelcontextprotocol#2858}
 * (SEP-2577 is the separate roots/sampling/logging deprecation). Remains
 * functional during the deprecation window — at least twelve months under the
 * feature lifecycle policy (SEP-2596), so 2027-07-28 is the earliest possible
 * removal date. Prefer a CIMD URL `client_id` when the authorization server
 * advertises `client_id_metadata_document_supported`: the built-in `auth()` flow
 * skips registration for you when that capability is advertised AND your
 * provider supplies `clientMetadataUrl`, but `registerClient` itself does not
 * gate — calling it directly always sends the registration request.
 */
export async function registerClient(
 authorizationServerUrl: string | URL,
Expand Down
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