PieterPost MCP for Claude.ai
io.github.pieterpost-com/pieterpost-mcp
Let AI agents prepare, review, pay for, and send real letters and postcards.
client:Claude.ai
transport:streamable-http
Install PieterPost MCP in Claude.ai
Settings → Connectors → Add custom connector
https://pieterpost.com/mcp/setup/Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs