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Title: SEP-2260 Require Server requests to be associated with a Client request. by evalstate · Pull Request #2260 · modelcontextprotocol/modelcontextprotocol · GitHub

Open Graph Title: SEP-2260 Require Server requests to be associated with a Client request. by evalstate · Pull Request #2260 · modelcontextprotocol/modelcontextprotocol

X Title: SEP-2260 Require Server requests to be associated with a Client request. by evalstate · Pull Request #2260 · modelcontextprotocol/modelcontextprotocol

Description: Specification and documentation for the Model Context Protocol - SEP-2260 Require Server requests to be associated with a Client request. by evalstate · Pull Request #2260 · modelcontextprotocol/modelcontextprotocol

Open Graph Description: Motivation and Context This PR tightens the scoping of Server to Client requests and to server as notice of upcoming changes where this pattern may not be supported by the underlying transport laye...

X Description: Motivation and Context This PR tightens the scoping of Server to Client requests and to server as notice of upcoming changes where this pattern may not be supported by the underlying transport laye...

Opengraph URL: https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260

X: @github

direct link

Domain: github.com

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SEP-2260 Require Server requests to be associated with a Client request.https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#top
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Feb 16, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#event-22818291207
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Assumption of Sampling and session might be wrong? modelcontextprotocol/java-sdk#119 https://github.com/modelcontextprotocol/java-sdk/issues/119
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seps/0000-Require-Server-requests-to-be-associated-with-Client-requestshttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/files/be71fe4ece211b6687e588027d012a2c2d7c68f8#diff-25d3b67322ce8c73844ee16bb3076587f2257ef658b91539a5bbc850a8874c39
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seps/0000-Require-Server-requests-to-be-associated-with-Client-requestshttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/files/be71fe4ece211b6687e588027d012a2c2d7c68f8#diff-25d3b67322ce8c73844ee16bb3076587f2257ef658b91539a5bbc850a8874c39
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seps/0000-Require-Server-requests-to-be-associated-with-Client-requestshttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/files/831021a50d41740cdcf6e08756b3caacafb18bf7#diff-25d3b67322ce8c73844ee16bb3076587f2257ef658b91539a5bbc850a8874c39
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seps/2260-Require-Server-requests-to-be-associated-with-Client-requests.mdhttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/files/831021a50d41740cdcf6e08756b3caacafb18bf7#diff-d86ade29a13a4df1749612754ebd71ce9a306f56a02afd347365d8b8a1c4efae
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February 18, 2026 11:00https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#commits-pushed-c84f68f
https://github.com/evalstate
Clarify request association rules and ping exception in draft spechttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/c84f68f982402722fbfdedcbe2988def50511d49
c84f68fhttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/c84f68f982402722fbfdedcbe2988def50511d49
https://github.com/evalstate
remove undeleted filehttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/1d282b5fb8e614749e1ca32db81b7c631583b344
1d282b5https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/1d282b5fb8e614749e1ca32db81b7c631583b344
https://github.com/evalstate
incorporate pcarleton suggestions, consistency of wordinghttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/17d0fce199dce6dd5be1ff9cac78f162e6d34c23
17d0fcehttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260/commits/17d0fce199dce6dd5be1ff9cac78f162e6d34c23
https://github.com/evalstate
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Feb 18, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#issuecomment-3920549508
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https://github.com/evalstate
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e148315https://github.com/modelcontextprotocol/modelcontextprotocol/commit/e14831553a82c059d6e2fc866084b26e82ae791a
Mar 10, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#event-23447393832
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https://github.com/markdroth
markdrothhttps://github.com/markdroth
Mar 12, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-pullrequest-4060960848
Writeup of design question for 2322-MRTR modelcontextprotocol/transports-wg#24 https://github.com/modelcontextprotocol/transports-wg/pull/24
SEP-2229: Unsolicited Tasks #2229 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2229
SEP-2339: Task Continuity #2339 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2339
SEP-2557: Adapt Tasks for Stateless & Sessionless Protocol #2557 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2557
https://github.com/apps/mcp-virtual-tpm
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2026-06-30-RChttps://github.com/modelcontextprotocol/modelcontextprotocol/milestone/4
Apr 17, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#event-24620801699
https://github.com/panyam
panyamhttps://github.com/panyam
Apr 21, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-issue-4304499823
SEP-2557: Tasks v2 — stateless/sessionless adaptation (parallel implementation) panyam/mcpkit#296 https://github.com/panyam/mcpkit/issues/296
https://github.com/guglielmo-san
guglielmo-sanhttps://github.com/guglielmo-san
Apr 29, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-issue-4350858686
Implement SEP-2260 Require Server requests to be associated with a Client request modelcontextprotocol/go-sdk#914 https://github.com/modelcontextprotocol/go-sdk/issues/914
https://github.com/mikekistler
mikekistlerhttps://github.com/mikekistler
Apr 30, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-issue-4354468114
2026-07-28 Spec Compliance modelcontextprotocol/csharp-sdk#1539 https://github.com/modelcontextprotocol/csharp-sdk/issues/1539
https://github.com/CaitieM20
CaitieM20https://github.com/CaitieM20
May 15, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-pullrequest-4455940085
feat: add conformance test yaml for sep-2260 modelcontextprotocol/conformance#278 https://github.com/modelcontextprotocol/conformance/pull/278
https://github.com/CaitieM20
CaitieM20https://github.com/CaitieM20
final https://github.com/modelcontextprotocol/modelcontextprotocol/issues?q=state%3Aopen%20label%3Afinal
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May 15, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#event-25589760814
https://github.com/mikekistler
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May 19, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-issue-4479902290
SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/csharp-sdk#1589 https://github.com/modelcontextprotocol/csharp-sdk/issues/1589
https://github.com/qdrddr
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May 25, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#issuecomment-4536176594
Please reload this pagehttps://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260
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[2026-07-28] Stateless Core overhaul modelcontextprotocol/php-sdk#334 https://github.com/modelcontextprotocol/php-sdk/issues/334
[Server][Protocol] SEP-2260: Scope server-to-client requests to in-flight client requests modelcontextprotocol/php-sdk#343 https://github.com/modelcontextprotocol/php-sdk/issues/343
Implement SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/typescript-sdk#2183 https://github.com/modelcontextprotocol/typescript-sdk/issues/2183
Implement SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/typescript-sdk#2186 https://github.com/modelcontextprotocol/typescript-sdk/issues/2186
https://github.com/alexhancock
alexhancockhttps://github.com/alexhancock
Jun 2, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-issue-4573025317
Implement SEP-2260: Server requests must associate with a client request modelcontextprotocol/rust-sdk#873 https://github.com/modelcontextprotocol/rust-sdk/issues/873
https://github.com/localden
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2026-07-28 Spec Implementationhttps://github.com/orgs/modelcontextprotocol/projects/41
Jun 6, 2026https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#event-26416909811
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/2260#event-26416909964
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/2260#event-26416911601
SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/java-sdk#1003 https://github.com/modelcontextprotocol/java-sdk/issues/1003
Implement SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/kotlin-sdk#807 https://github.com/modelcontextprotocol/kotlin-sdk/issues/807
Implement SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/python-sdk#2796 https://github.com/modelcontextprotocol/python-sdk/issues/2796
SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/ruby-sdk#381 https://github.com/modelcontextprotocol/ruby-sdk/issues/381
Implement SEP-2260: Require Server requests to be associated with a Client request modelcontextprotocol/swift-sdk#237 https://github.com/modelcontextprotocol/swift-sdk/issues/237
(implementation): SEP-2260 - Require Server requests to be associated with a Client request #2876 https://github.com/modelcontextprotocol/modelcontextprotocol/issues/2876
https://github.com/koic
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Jul 5, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-pullrequest-4813620578
Associate server-to-client requests with the originating client request per SEP-2260 modelcontextprotocol/ruby-sdk#440 https://github.com/modelcontextprotocol/ruby-sdk/pull/440
koichttps://github.com/koic
Jul 11, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260#ref-commit-6ddcc49
https://github.com/koic
Associate server-to-client requests with the originating client reque…https://github.com/modelcontextprotocol/ruby-sdk/commit/6ddcc4986502e78aa9a4c45450ff81751acf22c8
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modelcontextprotocol/modelcontextprotocol#2260https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2260
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