Send a letter from ChatGPT.

Add paperplane as a ChatGPT connector (MCP) and it can quote, send, and track real USPS letters in conversation — from $1.99, with a free sandbox mode.

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

Set it up in Other

Step 1

Any streamable-HTTP MCP client works

Point it at https://sendpaperplane.com/api/mcp — most clients use a "url" key under "mcpServers" (occasionally "httpUrl" or "serverUrl"). Only local stdio-launched clients need something else: the REST API below is the same tools and the same guarantees over plain HTTP calls.

# Quote (free, creates nothing)
curl -X POST https://sendpaperplane.com/v1/quotes \
  -H 'Content-Type: application/json' \
  -d '{ "mail_class": "certified", "page_count": 1,
        "to": { "name": "Property LLC", "line1": "1 Main St", "city": "Richmond", "state": "VA", "zip": "23220" },
        "text": "..." }'

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 ChatGPT? 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": {
    "mail": { "url": "https://sendpaperplane.com/api/mcp" }
  }
}

All agents · API docs

Common questions

How do I connect paperplane to ChatGPT?

In ChatGPT’s connector settings, add paperplane as a remote MCP server using the same MCP URL every other client uses — Claude, Cursor, and ChatGPT all connect to one endpoint.

What if my ChatGPT plan doesn’t support connectors?

Ask ChatGPT to fill in the REST API call with your letter and addresses, then run it yourself — same underlying API, one paste.

How much does sending cost?

First-Class letters start at $1.99, Certified Mail from $12.99 — quote_letter shows the exact total before anything is sent.