Guides
How the mail works — for people, then for software.
Start with a letter or a postcard, compare prices, and connect the hosted MCP server if an agent should mail for you.
Customer
How to send one postcard
Mail one postcard to yourself or someone else. Compare both postcard types, add artwork and an address, and approve your mailing online.
Customer
How to send a letter
Sign in, compose or upload a PDF, choose a mail class, pay, and authorize the send. For people using the workspace.
Pricing
List rates and extras
Current rates for First-Class, Certified Mail and postcards. Extra pages, Electronic Return Receipt, credits, and how you pay.
Developers
Hosted MCP
Point Claude or Cursor at /api/mcp. Send with an API key, org credits, or a Square checkout — no card numbers on the wire.