[vishalhabib99]

Summary

The call-for-papers MCP example's requirements.txt lists mcp with no version, so pip install -r requirements.txt (the README step, and the example's Dockerfile) now installs mcp 2.3.0. server.py imports from mcp.server.fastmcp import FastMCP, which mcp 2.x removed, so the server fails on import:

ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer ...

This is the same break the root pyproject.toml capped in 0.2.1 (#118); this example has its own requirements file, so the cap didn't reach it.

Changes

• examples/call-for-papers-mcp/requirements.txt: mcp -> mcp<2.
• CHANGELOG.md: a Fixed entry under [Unreleased].

Checks

uv pip compile of the example's requirements.txt (Python 3.11):

	resolves	from mcp.server.fastmcp import FastMCP
main	mcp==2.3.0, langchain-mcp-adapters==0.3.1	ModuleNotFoundError
this branch	mcp==1.30.0, langchain-mcp-adapters==0.3.2	works

• make ci passes: not run. The change is limited to an example's requirements file and the changelog, outside src/.
• CHANGELOG.md updated under ## [Unreleased]
• PR title uses a conventional prefix
• Commits are signed off for the DCO

[vishalhabib99]

Closing this since #147 moved the example to mcp 2.x, which fixes the start-up problem at the source. Thanks for the migration!

[dhl123]

Thanks for digging into this! We have migrated our agent examples to MCP 2.x, which avoids the version downgrade (#146). Closing this PR, the report was helpful in getting us there. Thank you! We appreciate!