FloatAPI — In-Browser API Tester & Interceptor

Test APIs inside active tabs. Auto-capture fetch/XHR, edit headers & body, bypass CORS, and export cURL/JS code snippets.

FloatAPI is a modern, lightweight, in-browser API client and network interceptor designed for developers, QA engineers, and API creators. Built seamlessly into the Chrome Side Panel, FloatAPI allows you to test endpoints, capture live network traffic, inspect payloads, and debug APIs directly alongside the web app you are building—without switching back and forth to heavy desktop apps. ✨ KEY FEATURES: 🚀 1. Side Panel API Workspace - Test REST APIs directly within your active browser tab via Chrome's native Side Panel. - Supports GET, POST, PUT, DELETE, PATCH, OPTIONS, and HEAD HTTP methods. 📡 2. Automatic Fetch & XHR Interceptor - Intercept and log live `fetch()` and `XMLHttpRequest` traffic from the active webpage in real time. - One-click copy intercepted requests directly into your workspace editor to replay or modify them. 🛠️ 3. Request Customization & CORS Bypass - Modify request headers, query parameters, and JSON / Form data payloads effortlessly. - Built-in header rules engine via `declarativeNetRequest` to bypass restrictive CORS policies during local testing. 💻 4. Code Snippet Export - Instantly convert any API request into ready-to-use code snippets in cURL, JavaScript (Fetch), and Python (Requests). 📁 5. Collections & Environment Variables - Organize your endpoints into custom collections. - Define environment variables (e.g. {{baseUrl}}, {{token}}) to reuse dynamic values across multiple requests. 🔒 6. 100% Private & Local - All API keys, request histories, and collections stay strictly inside your local browser. Zero server logging, tracking, or remote database sync. --- HOW TO USE: 1. Open any webpage and click the FloatAPI extension icon to launch the Side Panel. 2. Enable "Live Interceptor" to capture incoming fetch/XHR requests from the page. 3. Click any request to load it into the editor, adjust parameters or headers, and click "Send". 4. Export requests as cURL or code snippets with one click!