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Title: SEP-2352: Clarify authorization server binding and migration by dend · Pull Request #2352 · modelcontextprotocol/modelcontextprotocol · GitHub

Open Graph Title: SEP-2352: Clarify authorization server binding and migration by dend · Pull Request #2352 · modelcontextprotocol/modelcontextprotocol

X Title: SEP-2352: Clarify authorization server binding and migration by dend · Pull Request #2352 · modelcontextprotocol/modelcontextprotocol

Description: Specification and documentation for the Model Context Protocol - SEP-2352: Clarify authorization server binding and migration by dend · Pull Request #2352 · modelcontextprotocol/modelcontextprotocol

Open Graph Description: Summary Adds multi-AS guidance: clients SHOULD maintain separate registration state per AS and MUST NOT assume cross-AS credential validity Adds new "Authorization Server Binding" subsec...

X Description: Summary Adds multi-AS guidance: clients SHOULD maintain separate registration state per AS and MUST NOT assume cross-AS credential validity Adds new "Authorization Server Binding&quot...

Opengraph URL: https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352

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Conformance coverage for SEP-2352 (authorization-server binding & migration) modelcontextprotocol/conformance#285 https://github.com/modelcontextprotocol/conformance/issues/285
SEP-2352: authorization-server migration scenario modelcontextprotocol/conformance#286 https://github.com/modelcontextprotocol/conformance/pull/286
[2026-07-28] Authorization hardening (OAuth/OIDC) modelcontextprotocol/php-sdk#338 https://github.com/modelcontextprotocol/php-sdk/issues/338
[Client][Auth] SEP-2352: Key DCR registrations and tokens by AS issuer; reject cross-AS credential reuse modelcontextprotocol/php-sdk#361 https://github.com/modelcontextprotocol/php-sdk/issues/361
[Client] Add OAuth 2.0 credential storage interface (TokenStorageInterface) modelcontextprotocol/php-sdk#315 https://github.com/modelcontextprotocol/php-sdk/issues/315
[Client] Implement Dynamic Client Registration (RFC 7591) + pre-registered client support modelcontextprotocol/php-sdk#320 https://github.com/modelcontextprotocol/php-sdk/issues/320
https://github.com/guglielmo-san
guglielmo-sanhttps://github.com/guglielmo-san
May 27, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4531500551
Implement SEP-2352 modelcontextprotocol/go-sdk#978 https://github.com/modelcontextprotocol/go-sdk/issues/978
https://github.com/felixweinberger
felixweinbergerhttps://github.com/felixweinberger
May 29, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4547542744
Implement SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/typescript-sdk#2201 https://github.com/modelcontextprotocol/typescript-sdk/issues/2201
https://github.com/alexhancock
alexhancockhttps://github.com/alexhancock
Jun 2, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4573028159
Implement SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/rust-sdk#879 https://github.com/modelcontextprotocol/rust-sdk/issues/879
https://github.com/localden
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final https://github.com/modelcontextprotocol/modelcontextprotocol/issues?q=state%3Aopen%20label%3Afinal
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Jun 4, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#event-26317914184
https://github.com/localden
localdenhttps://github.com/localden
2026-07-28 Spec Implementationhttps://github.com/orgs/modelcontextprotocol/projects/41
Jun 6, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#event-26416912098
https://github.com/apps/github-project-automation
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2026-07-28 Spec Implementationhttps://github.com/orgs/modelcontextprotocol/projects/41
Jun 6, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#event-26416911785
SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/csharp-sdk#1634 https://github.com/modelcontextprotocol/csharp-sdk/issues/1634
SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/java-sdk#1007 https://github.com/modelcontextprotocol/java-sdk/issues/1007
Implement SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/kotlin-sdk#811 https://github.com/modelcontextprotocol/kotlin-sdk/issues/811
Implement SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/python-sdk#2800 https://github.com/modelcontextprotocol/python-sdk/issues/2800
SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/ruby-sdk#385 https://github.com/modelcontextprotocol/ruby-sdk/issues/385
Implement SEP-2352: Clarify authorization server binding and migration modelcontextprotocol/swift-sdk#241 https://github.com/modelcontextprotocol/swift-sdk/issues/241
(implementation): SEP-2352 - Clarify authorization server binding and migration #2880 https://github.com/modelcontextprotocol/modelcontextprotocol/issues/2880
https://github.com/mattzcarey
mattzcareyhttps://github.com/mattzcarey
Jun 9, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-pullrequest-4625460172
fix(client): invalidate credentials and re-register when the authorization server changes (SEP-2352) modelcontextprotocol/typescript-sdk#2271 https://github.com/modelcontextprotocol/typescript-sdk/pull/2271
https://github.com/maxisbey
maxisbeyhttps://github.com/maxisbey
Jun 17, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4682676338
Auth — 2026 client-side requirements modelcontextprotocol/python-sdk#2902 https://github.com/modelcontextprotocol/python-sdk/issues/2902
https://github.com/felixweinberger
felixweinbergerhttps://github.com/felixweinberger
Jun 23, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-pullrequest-4726235281
feat(client): SEP-2352 per-authorization-server credential isolation modelcontextprotocol/typescript-sdk#2348 https://github.com/modelcontextprotocol/typescript-sdk/pull/2348
https://github.com/Kehrlann
Kehrlannhttps://github.com/Kehrlann
Jun 23, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4727090664
MCP Client: SEP-2352: Clarify authorization server binding and migration spring-ai-community/mcp-security#83 https://github.com/spring-ai-community/mcp-security/issues/83
https://github.com/felixweinberger
felixweinbergerhttps://github.com/felixweinberger
Jun 24, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-pullrequest-4733702360
feat(client): SEP-2352 per-authorization-server credential isolation modelcontextprotocol/typescript-sdk#2358 https://github.com/modelcontextprotocol/typescript-sdk/pull/2358
https://github.com/BobDickinson
BobDickinsonhttps://github.com/BobDickinson
Jun 26, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-issue-4749783948
[MCP 2026-07-28] Authorization hardening modelcontextprotocol/inspector#1527 https://github.com/modelcontextprotocol/inspector/issues/1527
https://github.com/felixweinberger
felixweinbergerhttps://github.com/felixweinberger
Jun 26, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-pullrequest-4650383987
Implement MCP 2026-07-28 modelcontextprotocol/typescript-sdk#2286 https://github.com/modelcontextprotocol/typescript-sdk/pull/2286
https://github.com/koic
koichttps://github.com/koic
Jul 4, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-pullrequest-4809702202
Bind Stored Client Credentials to the Authorization Server Issuer per SEP-2352 modelcontextprotocol/ruby-sdk#439 https://github.com/modelcontextprotocol/ruby-sdk/pull/439
koichttps://github.com/koic
Jul 11, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352#ref-commit-36ff262
https://github.com/koic
Bind Stored Client Credentials to the Authorization Server Issuer per…https://github.com/modelcontextprotocol/ruby-sdk/commit/36ff2627e0fd11299de5c86b2e3c8b67ff073e8e
36ff262https://github.com/modelcontextprotocol/ruby-sdk/commit/36ff2627e0fd11299de5c86b2e3c8b67ff073e8e
modelcontextprotocol/modelcontextprotocol#2352https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352
#385https://github.com/modelcontextprotocol/ruby-sdk/issues/385
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https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/af043cbaf86930629e352d432b3ef945ec567327
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https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/af043cbaf86930629e352d432b3ef945ec567327
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https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/865c40f12b81345bb25b22a7b348817c2f821c9a
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https://github.com/KevinLuo2000
KevinLuo2000 https://github.com/KevinLuo2000
https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/25aed5a6d92c7d9f737d3a5947ab4ea327e82c8d
https://github.com/max-stytch
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https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/25aed5a6d92c7d9f737d3a5947ab4ea327e82c8d
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https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2352/files/aa60a6c6143741dcb7199f181e95c40091b60170
https://github.com/localden
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auth https://github.com/modelcontextprotocol/modelcontextprotocol/issues?q=state%3Aopen%20label%3Aauth
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2026-07-28 Spec Implementation https://github.com/orgs/modelcontextprotocol/projects/41
SEP Review Pipeline https://github.com/orgs/modelcontextprotocol/projects/12
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The authorization spec is unclear when multiple Authorization servers are involved https://github.com/modelcontextprotocol/modelcontextprotocol/issues/1349
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