Requestly: Intercept & Modify HTTP Requests

Tracking since Apr 1, 2026.

Changelog

• Jun 10, 2026
  permissions

  contextMenus, declarativeNetRequest, proxy, scripting, storage, tabs, unlimitedStorage, webNavigation, webRequest

  browsingData, contextMenus, declarativeNetRequest, proxy, scripting, sidePanel, storage, tabs, unlimitedStorage, webNavigation, webRequest

• May 22, 2026
  description

  🚀 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 Client, API Mocking & HTTP Interceptor.
  
  ⭐️ Open Source - https://github.com/requestly/requestly/
  
  🌟 Top Use Cases
  → A beautiful & privacy-friendly API-Client
  →  Mock API Responses to build frontend when backend isn't ready
  → Modify HTTP Request & Response Headers
  →  Test local JavaScript changes directly on production site.
  →  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 hit API endpoints and to intercept & modify requests.
      
  ======== Top Features ========
  
  👉 Beautiful & Privacy-Friendly API Client
  → Test API Responses
  → API Collections
  → Environments (Variables & Secrets)
  → Pre-Request & Post-Response Scripts
  → Team Workspaces
  📌  Demo Video – https://www.youtube.com/watch?v=xrqmAffe86k
  
  👉 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
  
  👉 Cloud-based API Mock Server
  →  Create API Mocks
  →  Generate Mock data (random data) in the API response
  →  Test Mock API endpoints using API client
  →  Add delay to the API Mocks
  →  Define custom HTTP status code & custom headers in the API Mock
  →  CORS enabled. The mock endpoints work seamlessly without CORS errors.
  📌 https://app.requestly.io/mocks
  
  👉 Session Recording
  →  Visual Bug Reporting Tool
  →  Cut down your bug reporting time & debugging time
  →  Automatically capture browsing video, Console logs, Network logs & env details
  →  Get quality bug reports from QAs, Customer Support & other non-technical people
  →  Easily Share Har files
  📌  Demo Video – https://www.youtube.com/watch?v=g_qXQAzUQgU
  
  👉 Requestly provides the following imports
  →  All workspace data including api collections, environments and scripts from Postman
  →  All api collections, and environments from Insomnia
  →  All workspaces, api folders, and environments from Bruno
  →  All HTTP header profiles from ModHeader
  →  JSON configuration for Redirects & Scripts from Resource Override
  →  XML configuration from Charles Proxy (Map local isn't supported yet due to technical limitations)
  📌  Docs -- https://docs.requestly.com/general/imports/postman
  
  👉 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
  💻 Desktop App -  https://requestly.com/desktop
  📳 Issues - https://github.com/requestly/requestly/issues
  🔓Privacy - https://requestly.com/privacy

  🚀 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

• May 22, 2026
  short_description

  Features: Intercept & Modify HTTPs Requests, API Mocking, GraphQL Mocking, Rest API Client, API Testing, Modify HTTP Headers, etc

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

• May 22, 2026
  name

  Requestly: Supercharge your Development & QA

  Requestly: Intercept & Modify HTTP Requests

Permissions & access

Permissions

browsingDatacontextMenusdeclarativeNetRequestproxyscriptingsidePanelstoragetabsunlimitedStoragewebNavigationwebRequest

Host access

<all_urls>

Screenshots

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