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Debugging proxy that will allow you to intercept and mutate requests from a web page Netify is a debugging proxy that will allow you to intercept and mutate your requests, like Fiddler or Charles, but it more compact and implemented directly in the Chrome. Features that Netify gives you: - Filter requests for proxy by URL, method or type of resource. - Redirect request to arbitrary URL. - Adding, replacing and removing request headers. - Replacing the request body, text/JSON, Base64 or form data. - Replacing the response status code. - Adding, replacing and removing response headers. - Replacing the response body with a text value, Base64, or file's content. - Adding an extra response delay - Cancel request on the client. - The above changes can be made according to predefined rules, by script or by making changes to the intercepted request (like breakpoint). Attention!!! This extension is based on the experimental features of the Chrome Devtool protocol, which may lead to inoperability with the update of the browser. If you have some trouble with Netify or you have some suggestions, please report it here (https://github.com/vladlavrik/netify/issues)
Inssman: Open-Source: Modify HTTP Request
Inssman add custom rules to modify HTTP requests and responses. It is a free developer tool that which helps developers to organize their work more fast and easy. Inssman monitors the browser network for all tabs and if finds a request which matches one of the rule will accordingly modify. ✳️ What can Inssman do?✳️ 👉 Redirect Request: ➡️ Redirect any request like HTML/CSS/JS/JSON/...etc. 👉 Block Request: ➡️ Block all type of request like GET/POST/PUT/...etc 👉 Modify Query Params: ➡️ Easily remove presenting parameters in the url or replace the existing one or adding new parameter. 👉 Modify Header: ➡️ Add/Remove/Append request and response headers. One of example is developer can fix issue like CORS by setting Content-Security-Policy, X-Frame-Options headers and all headers can by change by provide header and value. 👉 Modify Response: ➡️ This cool feature can return custom data from the network. Now is possible to return data types like HTML/CSS/JS/JSON. By choosing one of type developer can write custom code in the editor which has powerful user interface like VSCODE which supports everything that developer need to write code. 👉 Inject File: ➡️ You can easily inject external CSS and JavaScript files into any web page by simply providing the link to the file. This is a great way to quickly modify the style or functionality of a website without needing to manually edit the code. If you want to inject your own custom code into a web page you can enter HTML, CSS, or JavaScript directly into the extension, and it will be injected into the page as if it were part of the original code. 👉 HTTP Logger: ➡️ This feature allows you to easily view and analyze the request and response headers of all tabs in one place, giving you valuable insights into the data being exchanged. 👉 Modify Request Body: ➡️ Now it is possible to modify the request body for both APIs, XMLHttpRequest and Fetch. This new feature allows modification of the body without making any changes to the code. 🙌These all features are free and there isn't any limitation to create a rule.
Mokku
Adds the API mocker MOKKU to Chrome Developer Tools for seamless integration & testing. 🚀 Take Control of Your API Workflows with Mokku Stop waiting for backend deployments or struggling with unstable staging environments. Mokku is the ultimate developer tool that integrates directly into your Chrome DevTools to let you mock, modify, and manage API responses seamlessly. Whether you're building a frontend against a non-existent API or testing edge-case error states, Mokku gives you the power of a full mock server right inside your browser. Complete Control: Specify JSON bodies, HTTP status codes, time delays (latency), and custom headers. GraphQL Native: Full support for mocking GraphQL queries and mutations. Dynamic Responses: Go beyond static files. Write JavaScript functions to return complex, conditional data based on the request. Dynamic URL Matching: Use patterns like /goals/:goalId (powered by path-to-regexp v8.2.0). URL parameters are passed directly to your response functions. Pro Editor: Built-in Monaco Editor (the engine behind VSCode) for a premium coding experience. Modify request headers globally or on a per-URL basis. Perfect for testing auth tokens or custom headers without touching your source code. Projects: Group mocks and headers by project to keep your workspace clutter-free. Import/Export: Share mocks with your team or backup your setup by exporting project-based configurations. ⚙️ How it Works Mokku adds a dedicated tab to your Chrome DevTools. You can: Click-to-Mock: Pick any existing network call from your logs and turn it into a mock with one click. Start from Scratch: Create custom mocks manually for APIs that don’t exist yet. Safe Injection: Mokku is non-intrusive. It only injects scripts into localhost by default. For all other domains, it remains inactive until you manually enable it from the panel. Secure Storage: Your mocks are stored safely within your Chrome profile storage. Stop waiting for the backend. Start building with Mokku.
Mockiato — Free API Testing & Mocking Tool
Chrome extension to intercept requests, create real-time mocks, and auto-insert headers for web development & testing API. Mockiato is an extension for Google Chrome, designed to optimize web application development and testing. It allows you to intercept outgoing requests in real-time and create mocks for them, ensuring quick emulation of server responses. In addition, Mockiato enables the addition or modification of headers in requests. This feature significantly simplifies request configuration and saves developers' time. Combined, these tools provide flexibility and convenience, making the development and testing process more efficient and reliable. You can submit issues, bugs or feature request at https://github.com/avivasyuta/mockiato/issues
Relay – Intercept, Modify & Run HTTP Requests in Your Browser
Intercept, edit, and run HTTP requests directly in your browser. No account needed. Relay is an open-source Chrome extension that lets you capture, edit, and test HTTP requests directly in your browser. No account needed—just install and start using. Key Features 🔧 Capture HTTP Traffic in Real Time 📡 Relay intercepts HTTP and HTTPS requests as you browse, making it easy to filter by method (GET, POST, etc.) or URL so you only see the requests that matter. Modify Requests Instantly ✏️ Edit every aspect of a captured request, from the base URL and HTTP method to headers, query parameters, and body content. You can even adjust response details for flexible testing. Run API Requests in the Browser ⚡ Send and test API requests directly in your browser with immediate feedback—no need for external tools. You can also export requests as cURL commands if you need them for other uses. Save Your Sessions 📂 Organize and revisit your sessions, so you can easily review and analyze past requests when needed.
