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New files: request_handler.py and notification_handler.py with typed overloaded constructors
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Jan 30, 2026
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View reviewed changes
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| src/mcp/server/lowlevel/__init__.py | https://github.com/modelcontextprotocol/python-sdk/pull/1968/files#diff-23afa7c38ae84d72d250bef2c82600dea679b780385858d1f71047a5fa04e218 |
| Please reload this page | https://github.com/modelcontextprotocol/python-sdk/pull/1968 |
| src/mcp/server/lowlevel/experimental.py | https://github.com/modelcontextprotocol/python-sdk/pull/1968/files#diff-3e62e66c84aff2e748e8c750f1144de569f6e6e0fe2b9a45ab39794032b10b92 |
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| Please reload this page | https://github.com/modelcontextprotocol/python-sdk/pull/1968 |
| Please reload this page | https://github.com/modelcontextprotocol/python-sdk/pull/1968 |
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| February 2, 2026 19:24 | https://github.com/modelcontextprotocol/python-sdk/pull/1968#commits-pushed-ec9815f |
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| sketch: lowlevel server v2 with overloaded handler classes | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/ec9815f636677549c94d6b1f5481bb04ee76c457 |
| ec9815f | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/ec9815f636677549c94d6b1f5481bb04ee76c457 |
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| refactor: replace decorator-based handlers with RequestHandler/Notifi… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/eb35b3ca8c1668e1cf9beceff1d5776d529142da |
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| https://github.com/maxisbey |
| refactor: split RequestContext into handler context hierarchy | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/0b60fad14c0255750e846f4ee7e820ebf646225a |
| 0b60fad | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/0b60fad14c0255750e846f4ee7e820ebf646225a |
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| https://github.com/maxisbey |
| rename: self.endpoint -> self.handler in handler classes | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/bed7e3c8d0c907d8f6725f3e253bfcdacb0b9299 |
| bed7e3c | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/bed7e3c8d0c907d8f6725f3e253bfcdacb0b9299 |
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| https://github.com/maxisbey |
| refactor: decouple ExperimentalHandlers from Server internals, update… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/860e8d6e9465542c10451770d5ea3f0d021517b8 |
| 860e8d6 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/860e8d6e9465542c10451770d5ea3f0d021517b8 |
|
| https://github.com/maxisbey |
| refactor: update MCPServer to use RequestHandler pattern instead of d… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/17c459c4e53e10f00c7b248a857509a328068d0c |
| 17c459c | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/17c459c4e53e10f00c7b248a857509a328068d0c |
|
| https://github.com/maxisbey |
| refactor: collapse context hierarchy into single RequestContext class | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/8100870fb60f9395a794e439d59a2f3c3a81a783 |
| 8100870 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/8100870fb60f9395a794e439d59a2f3c3a81a783 |
|
| https://github.com/maxisbey |
| refactor: move _ping_handler below Server class | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/d5c3b5fd26549a9835d1d26c72cf9d286f61cc86 |
| d5c3b5f | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/d5c3b5fd26549a9835d1d26c72cf9d286f61cc86 |
|
| https://github.com/maxisbey |
| refactor: merge request_handler.py and notification_handler.py into h… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/952a29cc389a10ea34b719d26830dd7250d52f49 |
| 952a29c | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/952a29cc389a10ea34b719d26830dd7250d52f49 |
|
| https://github.com/maxisbey |
| refactor: move request_ctx contextvar to lowlevel server, remove per-… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/6f0b041662ff219ad8bc8c8127b61258c9b951af |
| 6f0b041 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/6f0b041662ff219ad8bc8c8127b61258c9b951af |
|
| https://github.com/maxisbey |
| docs: fix migration guide — request_ctx contextvar still exists | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/aa6d861257fe196b90f00818f3b0d77b8842c4a0 |
| aa6d861 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/aa6d861257fe196b90f00818f3b0d77b8842c4a0 |
|
| https://github.com/maxisbey |
| docs: fix stale examples in migration guide | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/24f1f39bf4cdbbd3fa59ab9da308331128411652 |
| 24f1f39 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/24f1f39bf4cdbbd3fa59ab9da308331128411652 |
| maxisbey | https://github.com/maxisbey |
| February 2, 2026 19:24 | https://github.com/modelcontextprotocol/python-sdk/pull/1968#commits-pushed-8eb7299 |
|
| https://github.com/maxisbey |
| refactor: address review — kw_only dataclass, type Experimental prope… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/8eb72990bdc9401111f0fde3b72ff5c170a7aecc |
| 8eb7299 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/8eb72990bdc9401111f0fde3b72ff5c170a7aecc |
| @DataClass | https://github.com/DataClass |
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| https://github.com/maxisbey |
| fix: allow ping handler override, add task overloads, update stale do… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/cafb3e505ec63e823479fa8da7b744324b95ed9d |
| cafb3e5 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/cafb3e505ec63e823479fa8da7b744324b95ed9d |
|
| https://github.com/maxisbey |
| docs: move lowlevel server sections to Breaking Changes in migration … | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/4255a996733d7577e2103a8e4c06488439bba494 |
| 4255a99 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/4255a996733d7577e2103a8e4c06488439bba494 |
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| https://github.com/maxisbey |
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| https://github.com/Kludex |
| Update src/mcp/server/lowlevel/__init__.py | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/044e12813b0da9f5d510d6cff829b7e014dc84de |
| 044e128 | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/044e12813b0da9f5d510d6cff829b7e014dc84de |
|
| https://github.com/maxisbey |
| refactor: remove request_ctx from lowlevel public API, fix experiment… | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/f10995ed9810fd62f456ee2b5c3028e763ad05e0 |
| f10995e | https://github.com/modelcontextprotocol/python-sdk/pull/1968/commits/f10995ed9810fd62f456ee2b5c3028e763ad05e0 |
| https://github.com/maxisbey |
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| force-pushed | https://github.com/modelcontextprotocol/python-sdk/compare/5e1bf86aa9aee5058f4f058bac22bacd34c113b3..f10995ed9810fd62f456ee2b5c3028e763ad05e0 |
| 5e1bf86 | https://github.com/modelcontextprotocol/python-sdk/commit/5e1bf86aa9aee5058f4f058bac22bacd34c113b3 |
| f10995e | https://github.com/modelcontextprotocol/python-sdk/commit/f10995ed9810fd62f456ee2b5c3028e763ad05e0 |
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Compare
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| February 2, 2026 19:24 | https://github.com/modelcontextprotocol/python-sdk/pull/1968#event-22475726832 |
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| Feb 3, 2026 | https://github.com/modelcontextprotocol/python-sdk/pull/1968#issuecomment-3841515529 |
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Feb 3, 2026
| https://github.com/modelcontextprotocol/python-sdk/pull/1968#ref-pullrequest-3887840105 |
|
refactor: replace lowlevel Server decorators with on_* constructor kwargs
#1985
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