How do I install Postbag?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Postbag need an API key?

The publisher lists these environment variables: POSTBAG_CODEX.

What transport does Postbag use?

Postbag runs locally over stdio.

When was Postbag last checked?

Last checked 2026-11-10. Local Claude Code and Codex sessions on one machine exchange letters through native inputs.

Postbag MCP server

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

uvx postbag==2.3.0

Credentials from the publisher

POSTBAG_CODEX — Path to the codex executable for Codex delivery when several are installed.

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1POSTBAG_CODEX=<value> claude mcp add io.github.parasxos-postbag -- uvx postbag==2.3.0

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.parasxos-postbag": {4      "command": "uvx",5      "args": [6        "postbag==2.3.0"7      ],8      "env": {9        "POSTBAG_CODEX": "<value>"10      }11    }12  }13}

claude_desktop_config.json

Local · pypiPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 2.3.0
API key

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Postbag

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install Postbag?

Does Postbag need an API key?

What transport does Postbag use?

When was Postbag last checked?

Documentation