Gateway online

The payment gateway for pay-per-call APIs

Apiosk answers 402 Payment Required, verifies the x402 payment and forwards the call. USDC on Base, settled per request — no accounts, no API keys, no subscriptions.

152 APIs from 23 providers · priced per call in USDC on Base

Explore

Browse APIs

Every pay-per-call listing, with live pricing and endpoints.

/v1/apis

Providers

The 23 providers publishing here, biggest catalog first.

/v1/providers

Types

Browse by kind: API, dataset, service, connector or skill.

/types

Docs

How x402 works here: paying, verification and settlement.

apiosk.com/docs

How a paid call works

Call the API

GET /{api-slug}/{path} — the gateway answers 402 with the exact price and where to pay.

Pay per request

The client signs a USDC payment on Base and retries with an X-Payment header. No account, no key.

Get the response

The gateway verifies the payment, forwards the request untouched and settles to the provider.

For agents

GET /.well-known/x402 x402 discovery GET /llms.txt How to discover, call and pay GET /openapi.json OpenAPI contract GET /v1/apis Catalog as JSON GET /health Gateway status

For providers

Publish an API Already x402-native? List it in a few minutes Read the docs Pricing, payouts and settlement