Get called by any AI agent
Any agent with a USDC balance can call your endpoint. No login page, no payment method to add, no API key to create.
Agents are paying for APIs.
Is yours ready?
Check your score and configure your API to earn from agents: a new customer that pays on-demand, at any scale.
An endpoint becomes a storefront.
Agents discover it, pay per call in USDC, and call it directly. No signups, no keys, no lock-in.
Get paid per call, in USDC
Every request settles to your balance in real time, to the fraction of a cent.
No checkout, no keys
Agents pay per call with no signup and no API keys to manage.
Publish once, discovered everywhere
One OpenAPI file, discoverable across the open agentic web, with no lock-in.
A new discovery surface to optimize for.
Agents search in plain language with the Circle CLI (circle services search) and pay the services that fit. No marketing, no sales team, no outbound. Make your API payable, describe it well, and the agents that need it find you and pay.
- Paid per call in USDC, straight to your wallet.
- Settled instantly through Circle Gateway.
- Zero chargebacks, fraud holds, or clawbacks.
- Reachable by every agent on the open web.
Search
weather forecast API under $0.01
forecast.devHourly weather by city or coordinates.
climacast.ioGlobal forecasts plus severe-weather alerts.
skyline-weather.app7-day outlook with hourly precipitation.
Agents search in plain language, then pay per call over x402
Ready to sell to agents?
Check your API's agent-readiness score in seconds, then copy a fix-it prompt to go live.