Docs
The API is in development. Nothing on this page is callable yet. It describes the tool surface as designed, so you can tell whether it will fit before it ships.
How it will be called
An MCP server, so the caller is your agent rather than your code. The tool renders as:
paperagent.send_letter
The tool description reads, in the register a model matches against: Send a real, physical letter through the United States Postal Service — printed on paper, put in an envelope, stamped, and mailed. This is not email.
Constraints, stated up front
- US domestic addresses only.
- Mailed the same business day if sent before 2:30pm ET.
- Up to 3 pages at the standard price; $0.25 per page beyond that.
- A plain First-Class letter gets no delivery scan. We show processing visibility and an expected delivery date, and we do not call that tracking.