CaptureApi HTTP Client - Api Testing Tool

Intercept, debug & replay HTTP requests. A comprehensive API client with collections and cURL support inside Chrome DevTools.

Stop switching context between your browser and external API clients like Postman or Insomnia. CaptureApi HTTP Client brings a full-featured API testing environment directly into your Chrome DevTools panel. Built with the latest Manifest V3 technology, this extension allows you to intercept, inspect, edit, and replay HTTP requests without ever leaving your current tab. It provides advanced capabilities including support for modifying restricted request headers such as Origin, Referer, and User-Agent, giving you complete control over your API testing scenarios. CaptureApi HTTP Client is lightweight, secure, and designed specifically for frontend developers and QA engineers who need a seamless debugging experience directly in their browser environment. 🚀 KEY FEATURES 1. Seamless DevTools Integration Access the "HTTP Tool" tab directly in your F12 Developer Tools. Debug APIs in the exact context of your web application. 2. Intercept & Record Traffic Automatically capture live Fetch and XHR requests occurring on the page. View status codes, timing, size, and methods (GET, POST, PUT, DELETE, PATCH, etc.) in real-time. 3. Edit & Replay Requests Found a bug? Don't just watch it happen—fix it. Click any captured request to open it in the editor. Modify: Query Parameters: Add, remove, or disable params. Headers: Tweak authorization tokens or content types. Request Body: Full support for JSON, Raw Text, x-www-form-urlencoded, and Multipart Form-Data (including file uploads). 4. Advanced Workspace & Collections Collections: Organize your requests into folders to keep your workspace clean. Tabs System: Work on multiple requests simultaneously with a familiar tabbed interface. History: Access your recently captured requests instantly. 5. cURL Import Have a cURL command from your backend team or server logs? simply paste it into the importer, and we'll convert it into an editable request instantly. 6. Developer-First Experience Syntax Highlighting: Beautiful JSON formatting for request/response bodies. Clean UI: Modern, distraction-free interface built with React & Tailwind. Local Storage: Your collections and history are saved locally in your browser. 🔒 PRIVACY & SECURITY Offline First: We do not track your usage or collect your API data. Local Execution: All requests originate from your browser, ensuring access to local/intranet APIs (localhost) works perfectly. Open Source: Transparent code for peace of mind. Why install HTTP CaptureExt Client? If you are tired of copying authentication tokens from the browser to an external tool, or if you need to quickly test how your backend handles different payloads without writing code, this is the tool for you. Update Log (v1.0.0): Initial release with Manifest V3 support. Added Collections and Drag & Drop support. Added Response visualizer with JSON formatting.