Send a letter from Factory CLI (droid).

Add paperplane to Factory CLI (droid) with one command and it can quote and send a real USPS letter — no account required, free sandbox mode included.

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

Set it up in Factory CLI (droid)

Step 1

Connect

droid mcp add paperplane https://sendpaperplane.com/api/mcp --type http

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 Factory CLI (droid)? 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

droid mcp add paperplane https://sendpaperplane.com/api/mcp --type http

All agents · API docs

Common questions

What’s the connect command?

droid mcp add paperplane, pointed at the MCP endpoint above, with --type http.

What tools does droid get?

quote_letter, send_letter, and get_letter_status for mailing, plus buy_credits for pre-funding sends. Postcards are live (from $1.99) via the REST API’s format field, though not yet an MCP tool argument.

How much does sending cost?

Letters start at $1.99 for First-Class; Certified Mail starts at $12.99. Every quote shows the exact total before you approve anything, and sandbox mode is free.