ResponseHub is a free Chrome add-on developed by ResponseHub that allows users to send HTTP requests and inspect their responses. With ResponseHub, users can easily send HTTP requests using various methods such as GET, POST, PUT, PATCH, DELETE, OPTIONS, and HEAD. The add-on also supports HTTP headers, URL search parameters, and basic authentication.

One of the key features of ResponseHub is the ability to preview the HTTP message before sending it. This allows users to verify the request details and make any necessary modifications. Once the request is sent, users can inspect the response body, headers, status code, and response time.

While ResponseHub currently offers a solid set of features, the developers have plans to introduce more in the future. Some of the upcoming features include support for additional authorization schemes, request history and collections, and more.