API FIXTURES FOR AI AGENTS

Test the unhappy path.

Realistic synthetic responses for government and commercial APIs. Choose an endpoint, a scenario, and a seed. Keep the response as JSON or import a WireMock mapping.

47 templates14 upstream APIs0.05 USDC · Base mainnet

Government data. Everyday integrations.

Ten common commercial integrations: GitHub, Stripe, Slack, Twilio, Shopify, PayPal, Google Maps, SendGrid, HubSpot, and OpenAI. Four government extras cover NWS, Census, BLS, and SEC. Coverage is limited to the listed endpoints and selected documented fields.

One request. A repeatable fixture.

{
  "service": "github",
  "operation": "repositories",
  "scenario": "rate_limited",
  "seed": 42,
  "format": "wiremock"
}

POST /v1/mocks returns a payment challenge. An x402-capable client pays 0.05 USDC and receives the fixture after settlement. The same seed and catalogue revision produce the same output.

Download the free GitHub example ↗ · OpenAPI JSON ↗ · Agent instructions ↗

A fixture catalogue, ready for your tests.

Each result includes the simulated status, headers and body, upstream documentation, version label and fixture revision. Free catalogue metadata lists supported combinations before you pay. See reference sources and verification scope ↗

All fixture data is synthetic. These are independent test responses; upstream providers do not endorse this service. Fixtures do not contact upstream APIs, execute Stripe payments, or emulate the complete state of an upstream service.