sparfenyuk/mcp-proxy v0.14.0

on GitHub

Features

• Add optional --initialization-timeout for stdio backend startup; ordinary tool calls keep their existing timeout behavior.
• Recover lost Streamable HTTP sessions on a later explicit request without transparently replaying operations.
• Preserve upstream completion capability, progress notifications, and tools/list pagination.
• Add Python 3.15 CI coverage, validated on Python 3.15.2 while retaining Python 3.10 support.

Reliability and compatibility

• Exit reverse stdio proxies when the local client disconnects, including during upstream initialization.
• Bound Streamable HTTP session DELETE teardown and server graceful shutdown.
• Include uv and uvx in the runtime container image.
• Read named-server configuration as UTF-8, accumulate repeated CORS origins, and correct log timestamp rendering.
• Refresh runtime and development dependencies, including Python-version-specific rpds-py resolution.

Operational notes

• Reverse stdio input is bounded to 4 MiB per frame and queued payload, and 128 admitted frames. Overflow fails explicitly; EOF cancels queued work. Clients must drain or close stdout.
• Session recovery never replays an operation that already started. Incompatible capabilities or lost state can require restarting the downstream client.
• Python 3.10 remains supported. Native Windows execution was not part of the local validation.

Full changelog: v0.13.3...v0.14.0