Server Spy - HTTP Headers & Server Inspector is a Chrome add-on designed to provide users with detailed insights into the HTTP headers and server technology of any active tab. This tool allows users to view all HTTP response headers, filter them by name or value, and easily copy individual header values. Additionally, it enables exporting the full header payload as JSON or generating cURL commands, making it a valuable resource for developers and security analysts alike.

The add-on also offers an automatic security analysis feature, assigning a grade based on header configuration and checking for critical security headers. Users can see the presence and configuration of SSL/TLS protocols, server identification, and caching configurations. With a user-friendly interface featuring both dark and light themes, Server Spy operates fully offline, ensuring complete privacy with no data sent outside the browser.