Send a letter from Cursor.

Cursor has an official one-click MCP install link — adding paperplane takes a single click, then you can ask Cursor to quote and send a real USPS letter.

Free to preview — see the exact PDF before you pay. Sending starts at $1.99, no account required.

Set it up in Cursor

Step 1

One-click install, or add to ~/.cursor/mcp.json

Add to Cursor →

{
  "mcpServers": {
    "paperplane": { "url": "https://sendpaperplane.com/api/mcp" }
  }
}

Try it: free, nothing mailed

Tell your agent:

Using the paperplane tools, quote a 1-page certified letter to Property LLC, 1 Main St, Richmond VA 23220, then send it in sandbox mode.

Not on Cursor? Any surface works.

The same three calls from the CLI, any MCP client or plain REST. Sandbox is free and mails nothing.

Send a letter

{
  "mcpServers": {
    "paperplane": { "url": "https://sendpaperplane.com/api/mcp" }
  }
}

All agents · API docs

Common questions

Is the "Add to Cursor" button a real Cursor feature?

Yes — it uses Cursor’s own documented deep-link format (cursor.com/docs/mcp/install-links), not a workaround.

What if I’d rather edit the config by hand?

Add the same URL to ~/.cursor/mcp.json under "mcpServers" — the deep link and the manual JSON do the same thing.

How much does sending cost?

Letters start at $1.99 for First-Class; Certified Mail starts at $12.99. Sandbox mode lets you try the full flow for free first.