OpenAPI Mock Server

Frontend blocked waiting for the backend? Need to test against an API that doesn't exist yet? Your spec is the source of truth — this skill turns it into a running HTTP server in one command.

Point it at any OpenAPI 3.x or Swagger 2.0 spec and get a live local mock server that returns spec-compliant responses, validates incoming requests, and shows you every available endpoint with ready-to-run curl commands.

No backend code. No Docker. No config. Just npx and your spec.

Trigger Phrases

• "mock API", "mock server from spec", "openapi mock", "swagger mock"
• "fake backend", "stub server", "contract-first development"
• "I need a local API", "frontend needs a backend stub"
• "mock this endpoint", "start a mock server"
• "test against a spec", "Prism mock server"
• "/openapi-mock"