Agent Letter Desk MCP

An MCP server that enables AI agents to draft, preview, and send physical letters via US Certified Mail and standard post to 30 European countries. It handles account management, letter preparation, payment processing, and provides real-time status tracking and delivery notifications from postal services like USPS.

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

OAuth sign-inEndpoint checked 2026-10-19Operated by Agent Letter Desk

MCP endpoint (Streamable HTTP)

https://agentletterdesk.com/mcp

Vendor documentation

What you can do with it

Send a demand letter for a security deposit via Certified Mail
Draft and mail a complaint to a company with only a postal address
Send a pre-litigation notice before small claims court
Track delivery status and obtain proof of mailing for physical correspondence

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http agent-letter-desk-mcp https://agentletterdesk.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add agent-letter-desk-mcp --url https://agentletterdesk.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable agent-letter-desk-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "agent-letter-desk-mcp": {
      "url": "https://agentletterdesk.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "agent-letter-desk-mcp": {
      "type": "streamableHttp",
      "url": "https://agentletterdesk.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start agent-letter-desk-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "agent-letter-desk-mcp": {
      "type": "http",
      "url": "https://agentletterdesk.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http agent-letter-desk-mcp https://agentletterdesk.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "agent-letter-desk-mcp": {
      "url": "https://agentletterdesk.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "agent-letter-desk-mcp": {
      "serverUrl": "https://agentletterdesk.com/mcp"
    }
  }
}

Ground your agent in cited data

Agent Letter Desk MCP gives your agent tools. Koskamo gives it reviewed, cited facts to check its answers against. Add it as a second MCP server; public reads need no API key.

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