API Contract Lab
Free
Client-Side
Projects
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Try an Example
Pet Store API (5 endpoints)
Task Manager API (8 endpoints)
Input
OpenAPI Spec
JSON Example
Endpoint List
Parse & Generate
Endpoint Summary
Output
Mock Responses
Code Snippets
Exports
fetch
curl
Python
React Query
Postman Collection v2.1
OpenAPI Example Bundle
Express.js
FastAPI
Mock Handler