Requestly: Intercept & Modify HTTP Requests

Intercept & modify HTTP(S) traffic: redirect URLs, modify headers, inject scripts, mock REST & GraphQL APIs, and more.

🚀 Best Chrome extension to supercharge Web Development & QA. Trusted by 300,000+ developers. 👉 Requestly works directly in Chrome with beautiful, modern UI and team collaboration features. Popular features – Modify HTTP Headers, Override API Responses, API Mocking, Redirect URLs, Insert Scripts & HTTP Interceptor. ⭐️ Open Source – https://github.com/requestly/requestly/ 🌟 Top Use Cases → Mock API Responses to build frontend when backend isn't ready → Modify HTTP Request & Response Headers → Test local JavaScript changes directly on production sites → Use HTTP Redirect Rule to load scripts from local or staging environments on production sites → Modify and Mock API Request payload, Response body, & Status Code → Override GraphQL Requests 📌 https://requestly.com/blog/what-is-requestly Requestly (now a part of BrowserStack) doesn't set up a proxy in your browser, and hence, developers don't face VPN issues or lags while using it. Requestly leverages Chrome Extension APIs under the hood to intercept & modify requests. ======== Top Features ======== 👉 Mock XHR & Fetch API requests (Stub API Responses or API Mocking) → Helps in building frontend faster when backend (or APIs) don't exist → Define Custom API Responses triggered by XHR/fetch → Modify/Override API responses → Mock GraphQL API responses → Simulate fake HTTP Status Code (400s or 500s) 📌 Demo Video – https://www.youtube.com/watch?v=KIPbxUGUYq8 👉 HTTP Interceptor Features → HTTP Redirects (API or JS Redirects from one env to another) → Swap Host/Domain of HTTP Requests → Modify HTTP Request & Response Headers → Override XHR Request Body & Response Body → Insert Scripts → Block Network Requests → Add/Simulate Delay in HTTP Requests 📌 Demo Video – https://www.youtube.com/watch?v=vfcGy2666us ======== HTTP Interceptor Features & their Use-Cases ======== 👉 Redirect URLs, Change Host, Modify Query Params (Map Remote or Map Local) → Use dev/staging APIs in production sites & test local changes without code changes → Debug remote Javascript by loading locally running JS in production sites → Switch Hosts (e.g. abc.com/* to xyz.com/*) using Replace Rule → Debug Ad Tracking Pixels, Debug A/B Test Campaigns, etc → Remote Debugging with Requestly on Production sites → Swap Adobe Launch (Adobe DTM) scripts in production with staging script 📌 Demo Video – https://www.youtube.com/watch?v=85GVaOWTnlE 👉 Insert Scripts to any Webpage → UserScripts are simple JavaScript/CSS code that can change the layout of a page, add or remove new functionality and content, or automate actions. → Use File Server to upload long scripts and Inject them using Script Rule → Inject your JS tags on potential customers' sites and test your features → The sales/product team can use this to demo the product directly on the prospect's website (10x engaging demo) 📌 Demo – https://www.youtube.com/watch?v=4dvucRjLwGY 👉 Requestly supports the following imports → All HTTP header profiles from ModHeader → JSON configuration for Redirects & Scripts from Resource Override → XML configuration from Charles Proxy (Map local isn't supported in chrome extension yet due to technical limitations in browser) 👉 Additional Features → Enable/Disable rules with a single click → Export and import the rules and maintain a backup for your rules → Easy collaboration with others. Share Rules with other Users in one click 📌 Demo – https://www.youtube.com/watch?v=BM7kTFy-vdc ======== References ======= 🏡 Website – https://requestly.com 📖 Docs – https://developers.requestly.com 🥷 Github – https://github.com/requestly/requestly 💻 API Client (Desktop App) – https://requestly.com/downloads/ 📳 Issues – https://github.com/requestly/requestly/issues 🔓 Privacy – https://requestly.com/privacy