Search results

[Bug] check_capability does not validate elicitation sub-capabilities (form/url)

Status: Open.

#2965 In modelcontextprotocol/python-sdk;

· Robin1987China opened on Jun 25, 2026

[Bug] validate_tool_use_result_messages raises false positive when tool_use is not followed by tool_result

Status: Open.

#2960 In modelcontextprotocol/python-sdk;

· Robin1987China opened on Jun 25, 2026

StreamableHTTP server accumulates CLOSE_WAIT sockets behind reverse proxy due to missing disconnect cleanup

Status: Open.

#2958 In modelcontextprotocol/python-sdk;

· simpson1045 opened on Jun 24, 2026

dict[str, T] tool return types lose Annotated/Field metadata in output schema

Status: Open.

#2935 In modelcontextprotocol/python-sdk;

· zlucas03 opened on Jun 20, 2026

Test foundations (safety nets)

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2905 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

Spec corrections & deprecation markers

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2904 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

Auth — 2026 client-side requirements

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2902 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

subscriptions/listen

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2901 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

HTTP standard headers + x-mcp-header

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2900 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

Caching hints (ttlMs / cacheScope)

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2899 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

MRTR (multi-round-trip requests)

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2898 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support

MCPServer as a thin composition of the 2026 helpers

spec-2026-07-282026-07-28 MCP spec release work2026-07-28 MCP spec release work

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2897 In modelcontextprotocol/python-sdk;

· maxisbey opened on Jun 17, 2026

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2026-07-28 spec support