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Title: refactor: replace lowlevel Server decorators with on_* constructor kwargs by maxisbey · Pull Request #1985 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: refactor: replace lowlevel Server decorators with on_* constructor kwargs by maxisbey · Pull Request #1985 · modelcontextprotocol/python-sdk

X Title: refactor: replace lowlevel Server decorators with on_* constructor kwargs by maxisbey · Pull Request #1985 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - refactor: replace lowlevel Server decorators with on_* constructor kwargs by maxisbey · Pull Request #1985 · modelcontextprotocol/python-sdk

Open Graph Description: Replace the decorator-based handler registration on the lowlevel Server with direct on_* keyword arguments on the constructor. Handlers are now raw callables with a uniform (ctx, params) -> resu...

X Description: Replace the decorator-based handler registration on the lowlevel Server with direct on_* keyword arguments on the constructor. Handlers are now raw callables with a uniform (ctx, params) -> ...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/1985

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refactor: type MCPServer handler signatures instead of Anyhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/edf48333a28f4aab27eae642ad5f5dac36296760
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refactor: type notify as ClientNotification, remove getattrhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/7801dc3e463c0003af5868577cc1b9dc1ab88d82
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fix: resolve pyright errors in ExperimentalHandlers.enable_taskshttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/5fd17d133741accd5e20422a0d16e526375e7fd4
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fix: advertise subscribe capability when handler is registeredhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/178d41f442cbbd1e5cf1d8d940bd79b609a87b0d
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refactor: make on_ping non-optional with default handler per MCP spechttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/ca8fd2e380c381f11fe9dce15891f8500edd7640
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fix: update tests to use new Server constructor kwargs patternhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/f4c256fd5753317c9ec04de2401bbd7f96e65c03
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fix: migrate experimental task server tests to new handler patternhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/b3f817fd2f6dc702645b6c101e57ec5b145fed93
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fix: migrate tests to new Server constructor kwargs patternhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/c72c2dc0b02fe1cc29a72239f0fb1fa39d80a0e7
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fix: skip partial task capability testshttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/793b144d39185bd4378aa72e33e1a6056a64d7e6
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fix: migrate examples and snippets to new Server constructor kwargs p…https://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/8da8b7b4593a8735e8326df87e5bd5cbdbe306bb
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fix: update README.v2.md prose to match new low-level Server APIhttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/92f0de5b3864bdb758d4524742c135d79db9ed0e
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fix: improve test coverage across lowlevel server and experimental taskshttps://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/f61ca1ff5aa3f80e7f534cdf87360791e3dcb333
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fix: cover experimental property cache-hit branch and fix completion …https://github.com/modelcontextprotocol/python-sdk/pull/1985/commits/c1a7020f225701e2684a178de8d1800997f96db9
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http://127.0.0.1:$port/mcphttp://127.0.0.1:$port/mcp
http://127.0.0.1:$port\\\http://127.0.0.1:$port%5C%5C%5C
http://127.0.0.1:23000/mcphttp://127.0.0.1:23000/mcp
http://127.0.0.1:23001/mcphttp://127.0.0.1:23001/mcp
http://127.0.0.1:23002/mcphttp://127.0.0.1:23002/mcp
http://127.0.0.1:23003/mcphttp://127.0.0.1:23003/mcp
http://127.0.0.1:23004/mcphttp://127.0.0.1:23004/mcp
http://127.0.0.1:23005/mcphttp://127.0.0.1:23005/mcp
#10https://github.com/modelcontextprotocol/python-sdk/issues/10
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Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/1985
https://github.com/maxisbey
maxisbeyhttps://github.com/maxisbey
Feb 19, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/1985#ref-issue-3964872609
Support custom method handlers with custom params and return types on MCPServer #2105 https://github.com/modelcontextprotocol/python-sdk/issues/2105
BryceEWatsonhttps://github.com/BryceEWatson
Mar 7, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/1985#ref-commit-b23b702
https://github.com/BryceEWatson
merge: resolve conflicts with upstream mainhttps://github.com/BryceEWatson/python-sdk/commit/b23b702b3daa6a160bfe6fe968d3e04439c39dc2
b23b702https://github.com/BryceEWatson/python-sdk/commit/b23b702b3daa6a160bfe6fe968d3e04439c39dc2
modelcontextprotocol#2203https://github.com/modelcontextprotocol/python-sdk/pull/2203
modelcontextprotocol#1985https://github.com/modelcontextprotocol/python-sdk/pull/1985
modelcontextprotocol#2095https://github.com/modelcontextprotocol/python-sdk/pull/2095
modelcontextprotocol#2080https://github.com/modelcontextprotocol/python-sdk/pull/2080
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https://github.com/modelcontextprotocol/python-sdk/pull/1985/files/c1a7020f225701e2684a178de8d1800997f96db9
https://github.com/Kludex
Kludex https://github.com/Kludex
https://github.com/modelcontextprotocol/python-sdk/pull/1985/files/903866c9ccd27f45b67b4ee5a30ab34f1cdafe28
Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/1985
https://github.com/maxisbey
https://github.com/Kludex
https://github.com/apps/copilot-pull-request-reviewer
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