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mcp/harbor
Verified official

marginal MCP

v0.3.0

sh.marginal/mcp

Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.

transport:streamable-http
Website

Target client

run in your project directory 

claude mcp add --transport http mcp https://marginal.sh/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.