HTTP 431 header-fields-too-large MCP

v1.0.0

io.github.sadri-dridi/http-431

Meaning of HTTP 431.

transport:streamable-http

Target client

run in your project directory

claude mcp add --transport http http-431 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-431/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.