PaperAgent — Send Physical Mail

Connect it to your AI

Claude Code

claude mcp add --transport http letters https://paperagent.dev/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://paperagent.dev/mcp

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "letters": {
      "url": "https://paperagent.dev/mcp"
    }
  }
}

Tools it offers

8 tools, as the server itself reported during our check on Oct 31, 2026.

• get_pricingReturn the published price list for mailing physical letters through USPS: the products on sale, what each one costs, how many pages it covers, and when sales tax applies. Amounts are in US cents. Every letter is one of
• validate_addressCheck a US postal address and return it in the normalized form the envelope will be printed with, plus any warnings. The address is checked against the Google Address Validation service, which receives the address and no
• create_draftCreate a draft of a physical letter to be printed on paper and mailed through USPS, and return its draft_id, page count and total price. A letter is at most 6 printed pages, at the same price whatever its length: up to 3
• update_draftChange the recipient, body, tier or colour of a draft that has not been sent, and re-price it. Returns a new page count and a new quote, so the previous total is void — state the new total to the user before sending. The
• preview_draftReturn a link to the rendered PDF of a draft together with its page count and current total price. Refreshes the stored price quote when pricing has changed. Use this to show the user exactly what will be printed and exa
• send_letterCreate an order for a real, physical letter through the United States Postal Service. It returns a payment link; no paper is printed, postage is bought, or letter is mailed until payment completes. Use this whenever the
• get_letter_statusReturn the current state of one letter: where it is, the date it goes to USPS, and the estimated delivery date. USPS does not scan plain First-Class letters at delivery, so a Standard letter ends at an expected delivery
• list_lettersReturn this account's letters, newest first, with the status, mail date and total for each. Use this to answer questions about what has already been sent. This creates nothing, changes nothing and mails nothing.

Questions