Show HN: APIFlow Studio – A browser API client with local mock responses

Category: devtools

Tags: api-testing, mocking, openapi, pwa, developer-tools

Score: 5.7/10 (Innovation: 5, Technical: 6, Documentation: 6, Utility: 6)

APIFlow Studio is a browser-based API testing and mocking platform that allows developers to execute live HTTP requests, generate synthetic mock responses, and run visual assertions without installation. It supports OpenAPI and Postman interoperability, and stores data locally via IndexedDB for privacy. The project is interesting for its combination of client-side mocking, proxy relay to bypass CORS, and offline PWA capabilities, though similar tools exist.

Target audience: backend devs, frontend devs, API developers, QA engineers

Repository: https://apiflowstudio.onrender.com/

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