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Intercept and modify fetch/xhr requests and responses on browser Receptor helps you intercept, inspect, and modify fetch and XHR requests and responses directly in Chrome, making it easier to debug APIs, test frontend behavior, and simulate backend changes without touching server code. Built for developers, QA engineers, testers, and API integrators, Receptor gives you fine-grained control over browser network traffic in real time. You can update request headers, response headers, request bodies, response bodies, query parameters, status codes, and delays using flexible matching rules based on URL, HTTP method, and other request details. Receptor is useful for API testing, frontend debugging, mocking responses, validating error handling, simulating alternate server behavior, and testing edge cases before release. Instead of changing your backend or setting up a separate proxy, you can modify live browser traffic directly where your application runs. What you can do with Receptor: - Intercept and modify fetch and XMLHttpRequest traffic - Edit request and response headers - Replace or update request and response bodies - Rewrite query parameters before requests are sent - Change response status codes - Simulate delayed responses and test loading states - Organize rules with scenarios and groups - Import and export local configurations - Create advanced request and response transformation workflows Receptor is designed for modern web development workflows and is especially helpful when working with SPAs, REST APIs, internal tools, staging environments, and frontend-heavy applications that rely on dynamic network requests. - Debug API integrations faster - Test frontend changes without backend deployment - Simulate success, error, and edge-case responses - Validate request payloads and headers - Reproduce bugs caused by specific API responses - Improve QA and regression testing in the browser If you need a flexible browser extension for request interception, response modification, API debugging, frontend testing, and network mocking, Receptor gives you a practical way to control fetch and XHR traffic directly inside Chrome.
Browser Proxy
Replace fetch, XMLHttpRequest, AJAX responses on the fly! Browser-Proxy allows you to mock responses of AJAX requests without leaving the browser on pages where you enabled it. You can choose what requests shall be overwritten, or even mock not yet existing APIs. You can change the response, status code, delay, response headers, set up chunking and use parts of the request as part of the response. It also lets you to share these mocks with someone though import and export, and all of this with a nice UI. - Change the response of fetch, XMLHttpRequest, Axios and other AJAX requests on the fly. - Mock Responses of not yet existing requests. - RegExp based rules for url, body or headers to decide what requests to override. - Import and export the overrides into JSON file to share in team. - Individual enabling and disabling of overrides on different sites, and grouping into folders. - Part of the request can be used as part of the response. - Mock file download interactions with chunking and custom delays. - Works offline. - Open source. For more details and documentation and source code visit: https://github.com/Vladislav-Boiko/browser-proxy -------------------------------------------- Change notes: 1.0.3 Added response highlighting and negation filter, fixed chunks duplication and variables removement bugs 1.0.2 Fixed communication between background scripts and popup in chrome v95+ 1.0.1 Removed permissions for clipboard copy according to the google review process 1.0.0 initial release
API Sniffer
方便追蹤API回傳的JSON內容的工具 在Console視窗中看到網頁內呼叫會回傳JSON的API位置及JSON內容
WittCepter
Take control of your browser network traffic WittCepter is a network analysis tool that captures and modifies browser traffic. It is essentially Postman with easier request building and request/response header modification. -------Features------- - Capture HTTP requests and responses - Modify and resend request bodies, headers, and URLs. - Add, modify, and remove request and response HTTP headers - Create custom HTTP headers - Bypass CORS - Filter the requests captured using HTTP methods, status codes, and URLs. - Easily debug network requests for the current tab by displaying all the requests and responses in a side panel. ---------------------- v.1.13.0 - Google OAuth login is no longer required. v.1.12.1 - Fix issue with no vertical scroll on the Stripe page. v1.12.0 - Get extension information from an API as opposed to hard coding. v1.10.0 - Add authentication to the tab HTTP request capture content script - Make the tab HTTP request capture on by default after initial sign in
Modify Http Header
** What can ModifyHeader do?** - Add, modify, and remove request and response headers - Use ModifyHeader to set X-Forwarded-For, Authorization, Access-Control-Allow-Origin, Content-Security-Policy, and your custom headers! ** Why ModifyHeader ** - ModfiyHeader is fast, efficient, and light-weight. You can quickly enable/disable header modification with just 1-2 clicks. - ModifyHeader provides you with many convenient features that will help you increase your development velocity with the least amount of frictions. - ModifyHeader is free to use.
