We’re open-sourcing Requestly - HTTP debugging proxy for Web and Mobile
Hey HN! We’ve open-sourced Requestly (https://github.com/requestly/requestly) - A network debugging proxy for web & mobile apps. Requestly intercepts all HTTP(s) requests & responses and provides full control to developers to modify the request/response like rewriting request URL to hit different environment or returning different response for APIs/scripts. In addition to HTTP(s) interception & modification capabilities, Requestly also offers Mock Server [0] & recording the browser sessions [1] with video, console logs, & network logs stitched together. We use…
In plain words
Requestly is an open-source network debugging proxy for web and mobile applications that intercepts and modifies HTTP requests and responses. Developers can use it to rewrite URLs, mock server responses, and test different environments. Available as a browser extension and cross-platform desktop app, it also records browser sessions with video, console logs, and network activity combined for easier debugging and troubleshooting.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey HN! We’ve open-sourced Requestly (https://github.com/requestly/requestly) - A network debugging proxy for web & mobile apps. Requestly intercepts all HTTP(s) requests & responses and provides full control to developers to modify the request/response like rewriting request URL to hit different environment or returning different response for APIs/scripts. In addition to HTTP(s) interception & modification capabilities, Requestly also offers Mock Server [0] & recording the browser sessions [1] with video, console logs, & network logs stitched together. We use rrweb[2] for this. Requestly is available as browser extension [3] with 175K+ downloads on Chrome Store & as a desktop app [4] on all platforms. Browser extension is written in javascript (slowly migrating to typescript now) and use chrome APIs for interception & modification. Desktop app is written in JS (slowly moving to typescript here too) & use electron as underlying framework to support cross-platform needs. For mock server & collaboration features, we use Firebase as backend. Here are some popular use cases how people use Requestly - Stress testing frontend code by testing bad API responses, API failovers, latencies, testing with huge API responses, etc. (You create different rules inside Requestly and enable/disable as per use case) - Testing scripts directly on customer sites - Switching environments for APIs & scripts - Developing features when APIs are not ready - Modifying live websites (prospects) and demo their product directly on client’s website instead of an internal website (Applicable for SaaS products that integrate with JS) Overall, we’re quite new to the open source world and still learning how to run an open-source product & roadmap. We’d love the HN community to share their feedback on what we’re building and how can we improve. If there’s anything that they’d like us to build in the future, we’re all ears. Check us out at [requestly.io](http://requestly.io) and [github.com/requestly/requestly](http://github.com/requestly/requestly) to give us a shot [0]: Mock Server - https://app.requestly.io/mocks [1]: Sample Session - https://app.requestly.io/sessions/saved/iedsEivORxdLTcBiNcBA [2]: https://github.com/rrweb-io/rrweb [3]: https://chrome.google.com/webstore/detail/redirect-url-modif... [4]: https://requestly.io/downloads
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