METER
pay per call · not per month
Your API earns per call, not per month.
No signup, no keys, no plans. A client asks, gets a price, signs, and asks again — settled onchain before the response arrives.
price: 0.001000 USDC
charged: 0.000037 USDC
The subscription was never the point.
Card networks take about thirty cents before they take a percentage. That floor is why every API became a monthly plan — not because anyone wanted one.
Minimum viable charge. Anything smaller loses money, so it gets bundled into a plan.
- Account required
- Monthly commitment
- Refunds and churn
What one real request actually cost. Charged exactly, settled in about a second.
- No account
- Pay per call
- Nothing to cancel
Four steps, one request.
The payment lives inside the HTTP exchange. Nothing is stored, nothing is provisioned.
Ask
The client hits your endpoint with no credentials at all — no key, no session, no prior relationship.
Get a price
Your server answers 402 with the amount, the chain, the token, and the address to pay.
Sign
The wallet signs a stablecoin authorization locally. No transaction yet, no gas spent guessing.
Settle
The retry carries the signature. Verified and settled onchain, then the response comes back.
Charge what it cost
Price is computed from real token usage, so a short call bills like a short call.
Built for agents
An autonomous client can't fill in a signup form. It can sign a payment inside a request.
Three lines on the server.
Wrap the route, set a price, point at a facilitator. Your handler stays exactly as it was.
// proxy.ts import { paymentProxy } from "@x402/next"; export const proxy = paymentProxy({ "/api/v1/chat": { price: "$0.001", network: "base-sepolia", payTo: "0x30e7…8440", }, });
Charge a tenth of a cent. Finally.
Running on Base Sepolia today. Bring your own endpoint and start metering it.