Cause

• The uv.lock file had the mcp package pinned to version 1.7.1.
• However, the mcp.client.streamable_http module is only available in mcp version 1.8.0 and above.
• As a result, the import failed with a ModuleNotFoundError when using version 1.7.1.

Additional Problem

• When trying to upgrade to mcp==1.8.0, the dependency resolver failed because the pyproject.toml and uv.lock file specified requires-python = ">=3.9.0".
• The resolver tried to ensure compatibility with Python 3.9, but mcp==1.8.0 requires Python 3.10 or higher, resulting in a dependency conflict.