fix(time): cap mcp dependency to <2 to prevent ImportError on SDK 2.0.0 - #4571
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cyforkk wants to merge 3 commits into
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fix(time): cap mcp dependency to <2 to prevent ImportError on SDK 2.0.0#4571cyforkk wants to merge 3 commits into
cyforkk wants to merge 3 commits into
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mcp 2.0.0 renamed McpError to MCPError, breaking the import in server.py. Since pyproject.toml had no upper bound, unpinned launchers like uvx resolved to 2.0.0 and failed at startup. Cap the dependency to mcp>=1.23.0,<2 as a short-term fix. Long-term migration to the v2 API can follow separately. Closes modelcontextprotocol#4570 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The lockfile was stale after adding the <2 upper bound to the mcp dependency. Update it so CI's `uv sync --locked` step passes. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The previous lockfile was generated with a mirror index URL (UV_DEFAULT_INDEX env var) which caused CI's `uv sync --locked` to fail. Regenerate with the default PyPI index. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Superseded by #4577 which combines all Python server fixes into a single PR. |
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Description
Closes #4570
The
mcp-server-timefails to start whenuvxresolves tomcpSDK 2.0.0, which renamedMcpErrortoMCPError. Sincepyproject.tomlhad no upper bound on themcpdependency, all unpinned launchers broke as of 2026-07-28.This PR caps the dependency to
mcp>=1.23.0,<2as a short-term fix, matching the workarounduvx --with "mcp<2" mcp-server-timethat users confirmed working.A longer-term migration to the v2 API can follow separately.
Changes
src/time/pyproject.toml: added<2upper bound to themcpdependency.Checklist
Co-Authored-By: Claude Fable 5 noreply@anthropic.com