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Bump mcp from 1.27.0 to 1.28.1#292

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dependabot/uv/mcp-1.28.1
Jul 17, 2026
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Bump mcp from 1.27.0 to 1.28.1#292
gvanrossum merged 1 commit into
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dependabot/uv/mcp-1.28.1

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Bumps mcp from 1.27.0 to 1.28.1.

Release notes

Sourced from mcp's releases.

v1.28.0

Deprecations

Two API surfaces now emit DeprecationWarning ahead of their removal in v2. Nothing is removed in 1.x, and the warnings fire only when the deprecated API is called - importing the modules stays silent.

  • WebSocket transport - mcp.client.websocket.websocket_client and mcp.server.websocket.websocket_servermodelcontextprotocol/typescript-sdk#1783
  • Experimental tasks API - ClientSession.experimental, Server.experimental, ServerSession.experimental, and the experimental_task_handlers= kwarg on ClientSession. Tasks (SEP-1686) were removed from the MCP specification and are expected to return as a separate MCP extension.

If your test suite runs with filterwarnings = ["error"] and exercises these paths, add a scoped ignore such as ignore:The experimental tasks API is deprecated:DeprecationWarning or ignore:The WebSocket .* transport is deprecated:DeprecationWarning.

See #2828 for full details.

What's Changed

New Contributors

Full Changelog: modelcontextprotocol/python-sdk@v1.27.2...v1.28.0

v1.27.2

What's Changed

Full Changelog: modelcontextprotocol/python-sdk@v1.27.1...v1.27.2

v1.27.1

What's Changed

Full Changelog: modelcontextprotocol/python-sdk@v1.27.0...v1.27.1

Commits
  • 777b8d0 [v1.x] Support TransportSecuritySettings in the WebSocket server transport (#...
  • 4720467 [v1.x] Set Development Status classifier to Production/Stable (#2976)
  • 6df3d73 [v1.x] Buffer per-request StreamableHTTP streams; store priming event before ...
  • 32d3290 [v1.x] Pass a list to parametrize in test_docs_examples (pytest 9.1.0 compat)...
  • 0dca751 [v1.x] Deflake the child process cleanup tests (#2839)
  • 52258a9 [v1.x] Add a v2 status banner to the README (#2835)
  • b8f4917 [v1.x] Deprecate the WebSocket transport and the experimental tasks entry poi...
  • 2309e5e fix: omit null optional fields from task result payloads (#2809)
  • 494eb11 [v1.x] Support Python 3.14 (#2769)
  • 6213787 [v1.x] Scope experimental tasks to the session that created them (#2720)
  • Additional commits viewable in compare view

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Bumps [mcp](https://github.com/modelcontextprotocol/python-sdk) from 1.27.0 to 1.28.1.
- [Release notes](https://github.com/modelcontextprotocol/python-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/python-sdk/blob/main/RELEASE.md)
- [Commits](modelcontextprotocol/python-sdk@v1.27.0...v1.28.1)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 1.28.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file python:uv Pull requests that update python:uv code labels Jul 16, 2026
Comment thread uv.lock
Comment on lines 4 to 10
resolution-markers = [
"python_full_version >= '3.13'",
"python_full_version >= '3.14' and sys_platform == 'win32'",
"python_full_version >= '3.14' and sys_platform != 'win32'",
"python_full_version == '3.13.*' and sys_platform == 'win32'",
"python_full_version == '3.13.*' and sys_platform != 'win32'",
"python_full_version < '3.13'",
]

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@copilot why this complicated set of markers? It would seem that the original marker is fine? Can you explain what I am missing?

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The expanded markers are auto-generated by uv — I didn't author them manually. The cause is that mcp 1.28.1 added pywin32 as a new platform-specific dependency:

{ name = "pywin32", marker = "sys_platform == 'win32'" },

When any package in the dependency graph introduces a sys_platform-conditioned dependency, uv must split its resolution markers along that platform axis so it can correctly track which packages are needed on Windows vs. non-Windows. That's why python_full_version >= '3.13' became four entries combining Python version and platform.

The uv.lock file is entirely machine-generated, so the extra verbosity there is expected and correct.

@gvanrossum
gvanrossum merged commit 793da52 into main Jul 17, 2026
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@gvanrossum
gvanrossum deleted the dependabot/uv/mcp-1.28.1 branch July 17, 2026 19:47
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