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Title: SEP-2350: Clarify client-side scope accumulation in step-up authorization by dend · Pull Request #2350 · modelcontextprotocol/modelcontextprotocol · GitHub

Open Graph Title: SEP-2350: Clarify client-side scope accumulation in step-up authorization by dend · Pull Request #2350 · modelcontextprotocol/modelcontextprotocol

X Title: SEP-2350: Clarify client-side scope accumulation in step-up authorization by dend · Pull Request #2350 · modelcontextprotocol/modelcontextprotocol

Description: Specification and documentation for the Model Context Protocol - SEP-2350: Clarify client-side scope accumulation in step-up authorization by dend · Pull Request #2350 · modelcontextprotocol/modelcontextprotocol

Open Graph Description: Summary Align server scope management in Runtime Insufficient Scope Errors with RFC 6750 Section 3.1 — servers report scopes needed for the current operation, not the union of previously granted s...

X Description: Summary Align server scope management in Runtime Insufficient Scope Errors with RFC 6750 Section 3.1 — servers report scopes needed for the current operation, not the union of previously granted s...

Opengraph URL: https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350

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May 24, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-pullrequest-4513333034
SEP-2350: accumulate scopes on step-up auth modelcontextprotocol/python-sdk#2676 https://github.com/modelcontextprotocol/python-sdk/pull/2676
[2026-07-28] Authorization hardening (OAuth/OIDC) modelcontextprotocol/php-sdk#338 https://github.com/modelcontextprotocol/php-sdk/issues/338
[Server][Auth] SEP-2350: Emit per-operation scopes in insufficient_scope 403 responses (RFC 6750 §3.1) modelcontextprotocol/php-sdk#362 https://github.com/modelcontextprotocol/php-sdk/issues/362
[Client] Implement OAuth scope handling (WWW-Authenticate, scopes_supported, step-up, retry-limit, omitted) modelcontextprotocol/php-sdk#322 https://github.com/modelcontextprotocol/php-sdk/issues/322
https://github.com/felixweinberger
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May 29, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-issue-4547542190
Implement SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/typescript-sdk#2200 https://github.com/modelcontextprotocol/typescript-sdk/issues/2200
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Jun 2, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-issue-4573027173
Implement SEP-2350: Clarify client-side scope accumulation (step-up auth) modelcontextprotocol/rust-sdk#877 https://github.com/modelcontextprotocol/rust-sdk/issues/877
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https://github.com/stefanoamorelli
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Jun 4, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-pullrequest-4591033490
feat: accumulate client-side scopes during step-up authorization (SEP-2350) modelcontextprotocol/rust-sdk#888 https://github.com/modelcontextprotocol/rust-sdk/pull/888
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SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/java-sdk#1005 https://github.com/modelcontextprotocol/java-sdk/issues/1005
Implement SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/kotlin-sdk#809 https://github.com/modelcontextprotocol/kotlin-sdk/issues/809
Implement SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/python-sdk#2798 https://github.com/modelcontextprotocol/python-sdk/issues/2798
SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/ruby-sdk#383 https://github.com/modelcontextprotocol/ruby-sdk/issues/383
Implement SEP-2350: Clarify client-side scope accumulation in step-up authorization modelcontextprotocol/swift-sdk#239 https://github.com/modelcontextprotocol/swift-sdk/issues/239
(implementation): SEP-2350 - Clarify client-side scope accumulation in step-up authorization #2878 https://github.com/modelcontextprotocol/modelcontextprotocol/issues/2878
https://github.com/maxisbey
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Jun 17, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-issue-4682676338
Auth — 2026 client-side requirements modelcontextprotocol/python-sdk#2902 https://github.com/modelcontextprotocol/python-sdk/issues/2902
feat(client): SEP-2350 scope step-up — union, retry cap, superset-gated refresh bypass modelcontextprotocol/typescript-sdk#2346 https://github.com/modelcontextprotocol/typescript-sdk/pull/2346
feat(client): SEP-2350 scope step-up — union, retry cap, superset-gated refresh bypass modelcontextprotocol/typescript-sdk#2356 https://github.com/modelcontextprotocol/typescript-sdk/pull/2356
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Jun 26, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-issue-4749783948
[MCP 2026-07-28] Authorization hardening modelcontextprotocol/inspector#1527 https://github.com/modelcontextprotocol/inspector/issues/1527
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Jun 26, 2026 https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2350#ref-pullrequest-4650383987
Implement MCP 2026-07-28 modelcontextprotocol/typescript-sdk#2286 https://github.com/modelcontextprotocol/typescript-sdk/pull/2286
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Clarify client-side scope accumulation behaviour during step-up authorization https://github.com/modelcontextprotocol/modelcontextprotocol/issues/2349
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