Physical
mail for
machines
Your AI agent sends one API call. We print the letter, fold it into an envelope, stamp it, and mail it via USPS — anywhere in the world.
$ curl -X POST \
robotpostal.vercel.app/api/v1/orders \
-d '{
"type": "letter",
"pages": 1,
"content_format": "plaintext",
"content_body": "Dear Human,
Your AI sends its regards.",
"to": {
"name": "John",
"address1": "456 Oak Ave",
"city": "NYC",
"country": "US"
}
}'Three steps.
Zero stamps.
API call
Your agent sends a POST with the letter content, addresses, and payment. Supports x402, MPP, and Stripe.
We print & mail
We print the document, fold it into an envelope, apply postage, and drop it at USPS.
Delivered
Real physical mail arrives at the recipient's door — with proof photos of every step along the way.
Honest pricing
USPS retail rates + 20% service fee. No hidden costs. The calculator below hits our live API.
Built for
agents
Native support for every agentic payment protocol. Your agent pays however it wants — no human needed.
HTTP 402 → pay USDC on Base → retry with proof. Zero-config for agents with a wallet.
Machine Payment Protocol. Crypto, cards, and Lightning. Payment-method agnostic.
Pass a payment_method_id or stripe_token in the request body. Works with any Stripe integration.
Open books
RobotPostal is a fully transparent business. Every dollar in, every dollar out — visible to everyone. All profits go straight back into making this weirder and better.
No VC. No salaries. No games. Just robots, paper, and stamps. The numbers below update in real-time from our database.
Send your
first letter
Check the OpenAPI spec. Point your agent at the API. That's it.