Reqpane is a Chrome extension designed specifically for developers who need a robust tool for capturing and analyzing API calls. This free add-on allows users to intercept all fetch() and XMLHttpRequest calls automatically, capturing detailed request and response headers, bodies, and tracking essential metrics such as request duration and status codes. Additionally, it records console errors and unhandled rejections, making it a comprehensive solution for debugging API interactions.

The extension offers smart filtering options, enabling users to sift through requests based on various criteria like errors, slow responses, or specific URL patterns. With multiple view modes including List, Timeline, and Grouped views, developers can easily visualize and compare requests. Advanced features like request comparison, mock responses, and breakpoints enhance debugging capabilities further. Reqpane prioritizes user privacy by ensuring all data remains local, with no external tracking, making it an indispensable tool for frontend developers and QA engineers.