{"id":85821,"title":"Requestly - Open-Source API Mocking \u0026 Testing Tool for Developers 🚀","tagline":"A better alternative to Postman \u0026 Charles Proxy","body":"Hey founders! Sachin here.\n\nWhat I started with a simple Chrome extension to solve one simple use case has evolved into a complete API Testing \u0026 Mocking platform - now used by more than half of Fortune 500 companies.\n\n**TL;DR:** Requestly helps developers build faster by intercepting, mocking, and testing API responses. No more waiting for backend developers, struggling with flaky staging environments, or fighting over API contracts. With 200,000+ active installs, Requestly is trusted by Google, Amazon, Workday, Indeed, and many other Fortune 500 companies.\n\n[Demo Video](https://www.youtube.com/watch?v=w5lCzZRmnZ0):\n\n**The Problem**\n\nFrontend developers face two common problems during their local development: Dependency on backend developers (i.e. Waiting for APIs) and Unstable backend services.\n\nWhether it's:\n\n* The backend team still building the endpoint\n* API not returning the data required for the development\n* Flaky Staging/Backend servers being used for local development\n* Need to modify API responses for testing error paths in frontend codebase\n\nThis leads to delayed releases, blocked sprints, and frustrated developer experience.\n\n**Enter Requestly**\n\nRequestly lets you intercept, mock, and test API responses in browsers and mobile apps.\n\nCore Features:\n\n* **Mocking API Responses:** Instantly mock any API response without touching the backend or your frontend code.\n* **Testing API Responses:** Quickly Test API responses with a sweet, simple API client.\n* **Mocking a Complete Flow:** You can either create API mocks for selective requests or record a user flow and create mocks for the entire flow.\n* **Collaboration using Team Workspace:** Save and reuse common API mocks across your teams with collaboration enabled in real-time.\n\n**Why people love it**\n\n**Frontend Teams:** Build features without waiting for backend APIs or dealing with staging server issues.\n\n**QA Teams:** Test edge cases in APIs and UI for error scenarios easily\n\n**Backend Teams:** Build, Design, Test and Collaboration on APIs\n\n**Enterprise Ready:** Used by over half of Fortune 500 companies including Google, Workday, Indeed, CapitalOne, MasterCard, and AutoDesk\n\n**Other Common Use-Cases**\n\n**1. Overriding JS Bundles** While talking to the enterprise users, we discovered that Overriding JS bundles from production to local/staging environments is one of the major use cases. They do this to test their local code changes directly on the production website by overriding the JS assets.\n\n**2. API Testing** We ended up building a sweet, simple API client for our customers for basic API testing, and now this has become a core feature of our product. We already offer capabilities like Collections, Environments, Workspaces, and Collaboration.\n\n**Testimonial**\n\n\"Requestly is an incredibly useful tool for developers working on a large team with multiple staging envs, or numerous app endpoints for various APIs in a local environment. Requestly combines all the power of complicated tools like Charles Proxy and Postman. I highly recommend giving it a try if you haven't already–it will make your dev work so much easier.\"\n\n— Joél, Senior Software Engineer at Autodesk\n\n**What we are planning next**\n\n* Building better API mocking capabilities for Android/iOS devices \u0026 simulators. We have already migrated some companies from Charles Proxy \u0026 Postman to Requestly and it has worked well.\n* Building more API testing features like Collection Runners, Scripting, and API test cases.\n* Learn how to market well. So far all of our growth has been organic. We did try some activities in the past but we weren't consistent.\n* Improve our customer success. We have a lot of free and paying users but we currently do not have any process to stay in touch with them and keep collecting their feedback.\n\n**🙏 Our Ask**\n\n* Try us out. Please get started by installing our Chrome Extension: \u003chttps://chromewebstore.google.com/detail/requestly-intercept-modif/mdnleldcmiljblolnjhpnblkcekpdkpa\u003e\n* If you know Requestly could be useful to someone you know, please spread the word :)\n\n🎁 **Special YC Deal:** 6 months free for your entire team on our Professional plan.\n\nDrop me a line at [sachin@requestly.io](mailto:sachin@requestly.io) or book a demo: [https://app.cal.com/sachin-rq/30min.](https://app.cal.com/sachin-rq/30min)\n\nSachin\n\n![uploaded image](/media/?type=post\u0026id=85821\u0026key=user_uploads/89898/ae74d725-a8fc-4db5-8077-77b6b511488d)\n\n","slug":"MKD-requestly-open-source-api-mocking-testing-tool-for-developers","created_at":"2024-11-25T07:44:19.492Z","updated_at":"2026-05-14T02:32:25.834Z","total_vote_count":28,"url":"https://www.ycombinator.com/launches/MKD-requestly-open-source-api-mocking-testing-tool-for-developers","share_image_url":"https://www.ycombinator.com/media/?type=post\u0026id=85821\u0026key=user_uploads/89898/ae74d725-a8fc-4db5-8077-77b6b511488d","company":{"id":25690,"name":"Requestly","slug":"requestly","url":"https://requestly.com","logo":"https://bookface-images.s3.amazonaws.com/small_logos/397665634f98c5b29320b633cf76ae515930481f.png","batch":"Winter 2022","industry":"B2B","tags":["Developer Tools","SaaS","Open Source","API"],"search_path":"https://bookface.ycombinator.com/company/25690"}}