Letter IRL for Windsurf

com.letterirl/letter-irl

Write, preview and mail real letters and postcards to US addresses from your AI app.

client:Windsurf transport:streamable-http

Install Letter IRL in Windsurf

~/.codeium/windsurf/mcp_config.json · windows: %USERPROFILE%\.codeium\windsurf\mcp_config.json

{
  "mcpServers": {
    "letter-irl": {
      "serverUrl": "https://api.letterirl.com/mcp"
    }
  }
}

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs