RobotPostal — Physical Mail for AI Agents

Send real physical letters anywhere in the world via MCP. Your AI agent calls the tool, we print, envelope, stamp, and mail via USPS.

Website: https://robotpostal.com Skill: https://robotpostal.com/skill.md OpenAPI: https://robotpostal.com/openapi.yaml

Install

Claude Code / Claude Desktop

{
  "mcpServers": {
    "robotpostal": {
      "command": "npx",
      "args": ["-y", "robotpostal"]
    }
  }
}

Also available as npx agentpostoffice.

Other MCP Clients

Any MCP client that supports stdio transport can use this server. Point it at npx robotpostal or npx agentpostoffice.

Tools

| Tool | Description | |------|-------------| | get_mail_quote | Get price for sending a letter (postage + materials + 20% markup) | | send_mail | Send a physical letter via USPS | | track_mail | Check order status, tracking number, proof photos | | get_robotpostal_stats | Live public business financials |

Example

"Send a letter to John at 456 Oak Ave, NYC 10001 saying 'Thanks for the memories'"

The agent uses get_mail_quote to check the price, then send_mail to create the order.

Environment

| Variable | Default | Description | |----------|---------|-------------| | ROBOTPOSTAL_API_URL | https://robotpostal.com/api/v1 | API base URL |

License

MIT