MCP connector for ChatGPT

Send mail from ChatGPT

Add paperplane as a ChatGPT connector (MCP) and it can quote, send, and track real USPS letters in conversation — from $0.99, with a free sandbox mode.

Open in ChatGPT

From $0.99 · postage included · no account needed

MCP server URLExample

https://sendpaperplane.com/api/mcp

paperplane · ChatGPT

Mail this deliverable to the client, certified.

Here’s the draft. I’ll get a quote before anything is sent.

Total, postage included$12.99

Sandbox free · holds 30 minApprove to send

Nothing prints until you approve. Order ord_8k2d.

Instead of asking ChatGPT to draft it and printing it yourself

ChatGPT writes the letter; you still print it, address it, stamp it and take it to a post office, and Certified Mail means a form at the counter. With the connector the same conversation ends with a tracking number.

How it works

Set up ChatGPT in three steps.

MCP connector for ChatGPT

Step 01
Add the connector
In ChatGPT’s connector settings, add a remote MCP server with the paperplane URL.
Step 02
Ask it to draft and send
ChatGPT calls quote_letter for the exact price, then send_letter. Add a prepaid credit code for hands-off sending.
Step 03
Approve the price. It ships.
Approve the paperplane payment link it returns; paperplane prints and hands it to USPS. Ask for status any time.

Copy the config.

MCP server URL

https://sendpaperplane.com/api/mcp

Fallback: direct REST call

curl -X POST https://sendpaperplane.com/v1/orders \
  -H 'Content-Type: application/json' \
  -d '{
    "mail_class": "first_class",
    "sandbox": true,
    "text": "Dear Ms. Alvarez, ...",
    "to":   { "name": "Maria Alvarez", "line1": "1 Main St",
              "city": "Richmond", "state": "VA", "zip": "23220" },
    "from": { "name": "Alex Rivera", "line1": "12 Grove Ave",
              "city": "Richmond", "state": "VA", "zip": "23221" },
    "email": "alex@example.com"
  }'

Under the hood

The connector is our standard MCP endpoint — the same one Claude and Cursor use — so capabilities stay identical across assistants, and improvements land everywhere at once.

Supported action fields

Every integration maps into the same fixed set of fields, the ones the REST API and MCP tools take directly.

Field	What it does
mail_class	first_class, certified, certified_err (Certified with electronic Return Receipt), or priority
text or pdf_url	the letter body as plain text, or a fetchable PDF to print as-is
to	recipient name + street/city/state/zip, verified against USPS data
from	return address, printed on the envelope and used for undeliverable mail
email	where the receipt and status updates go — no account required

Or skip the automation tool: ask Claude or ChatGPT

Every integration here sits on the same MCP endpoint agents use directly. Instead of wiring a trigger to an action, ask Claude or ChatGPT to draft and mail the letter. Same mailing tools (quote_letter, send_letter, get_letter_status), same price, same free sandbox.

Send mail from Claude Send mail from ChatGPT

Send your first letter from ChatGPT.

Sandbox runs the whole pipeline for free and mails nothing. Live sends start at $0.99, one all-in price.

Send a letter

https://sendpaperplane.com/api/mcp

Common questions

What if my ChatGPT plan doesn’t support connectors?

Ask ChatGPT to fill in the curl command on this page with your letter and addresses, then run it yourself — same API, one paste.

Is it safe to let an assistant send mail?

A human approves every live payment, screening checks every letter before printing, and sandbox mode lets you test end-to-end for free first.

How much does it cost?

The same pricing as the website: First-Class from $0.99 all-in, Certified from $12.99 — the quote_letter tool shows the exact total before anything is sent.