Soup, or libsoup as it is commonly called, is an HTTP library designed to be used in graphical applications which need asynchronous operations to avoid blocking the user interface while network requests are going on.

Soup provides functionality for using HTTP cookies, SSL encrypted connections, and the XML-RPC protocol based on HTTP.

Trivia: Soup is called "soup" because it started as a library for doing SOAP requests over HTTP. Spanish speakers who are learning English frequently confuse the words "soup" and "soap", and this seemed like a funny and interesting name to use.