DoppelAPI – Instant AI-driven mock server from OpenAPI definitions

Summary: DoppelAPI creates a live mock server by generating realistic, schema-compliant responses from OpenAPI (Swagger) definitions using AI. It replaces static mocks with dynamic data like emails and UUIDs, enabling frontend development without waiting for backend completion.

What it does

DoppelAPI reads your OpenAPI specification and instantly spins up a functional mock server that returns intelligent, realistic data matching the schema. It includes a dashboard for request and response examples and supports simulating network latency and errors.

Who it's for

Frontend developers needing to build and test interfaces before backend APIs are ready benefit from DoppelAPI’s dynamic mock server capabilities.

Why it matters

It eliminates delays caused by unavailable backend APIs and removes the need for manual mock data creation, streamlining frontend development workflows.