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mcp/harbor
Verified official

postbag MCP

v2.3.0 changelog · 3

io.github.parasxos/postbag

Local Claude Code and Codex sessions on one machine exchange letters through native inputs.

transport:stdio runtime:pypi
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Target client

run in your project directory

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

claude mcp add postbag -e POSTBAG_CODEX=<POSTBAG_CODEX> -- uvx postbag

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok LangChain

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.