x402 payments · USDG · Robinhood Chain
Let AI agents pay you
per request, in dollars.
Put a price on any API in five minutes. Agents pay in USDG with every call, the money lands in your wallet, and every payment comes with a receipt your finance team can use.
No code · No fee to list · 0% taken from payments · The only paid step is an optional x402 Identity name
One request. One payment.
Walk through it slowly →The agent asks
An AI agent calls your API, just like any app would.
GET /g/fx-rates?pair=EURUSD
No code
Paste the URL of the API you already run. x402Fi puts the paywall in front of it.
Verified payee
Link an x402 Identity name so buyers can confirm, onchain, that they are paying you.
Audit-ready
A ledger, a receipt for each payment and a CSV export with transaction hashes.
Self-custodial
USDG goes from the buyer's wallet to yours. x402Fi never holds funds.
For institutions
Built to be audited.
Machine payments only work at scale if a controller, an auditor and a counterparty can all check them. x402Fi is designed around that from the first request.
- Service
- FX rates · EUR/USD
- Amount
- 0.01 USDG
- Payer
- 0x3a1…77e0
- Paid to
- acme.402api.eth
- Payee check
- Verified · payee-bound
- Network
- Robinhood Chain (4663)
- Transaction
- 0x4be2…09a2
Sample receipt. Real receipts link each payment to its onchain transaction.
For
Businesses
Sell data and services to AI agents without building billing, API keys or invoices.
List a service →For
Institutions
Understand x402 with a live, plain-English walkthrough, then pilot it with receipts and controls.
Read the brief →For
Developers
Use the public facilitator for Robinhood Chain, or add middleware to your own server.
Read the docs →