Contract-first development made simple. Paste an OpenAPI spec, JSON example, or endpoint list — get mock responses, code snippets, and exportable Postman collections in seconds.
OpenAPI YAML/JSON, raw JSON examples, or simple endpoint lists. Paste what you have and we'll parse it.
Realistic data per endpoint with status code variants — Success (200/201), Error (400/401/404), Server Error (500).
Generate fetch, curl, Python requests, and React Query snippets ready to drop into your project.
Postman Collection v2.1, OpenAPI example bundle, and mock handler scripts for Express.js or FastAPI.
Drop your OpenAPI spec, JSON sample, or endpoint list into the editor.
We extract paths, methods, schemas, and infer structure from your input.
Get mock responses, code snippets, Postman collections, or mock server code.