WebSpy is a Chrome extension developed by extensioncreatorsllc. It is a free program in the Browsers category, specifically in the Add-ons & Tools subcategory.

WebSpy allows users to monitor HTTP GET/POST requests and provides an XML/JSON Viewer/Formatter for both request and response body. With this tool, users can explore and test websites by sending custom HTTP requests.

One of the standout features of WebSpy is its ability to view all requests on any website and edit the request and response headers and body in XML/JSON/HTML/TEXT format. This makes it a powerful API testing and analysis tool.

Additionally, WebSpy enables users to send various types of requests including GET, POST, PUT, PATCH, and DELETE. It also allows users to repeat and edit any existing request. The program also includes built-in JSON, XML, CSS, and HTML Viewer/Formatter.

Overall, WebSpy is a valuable tool for optimizing and testing websites. It functions similar to Postman but is conveniently integrated within the Chrome browser.