Feature summary (what you would like to be able to do and where):
It would be nice to have a way to serialize a request performed by the API Sandbox into some common format, for instance as a cURL command. This is similar to what browsers do in the Network tab. More formats could be also added.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
As a WMF developer I often want to perform requests to the MW API from other contexts than a wiki site. This can be the terminal but also an external backend service or a client application. Authenticating from a development environment can be tedious and varies across wikis. Using the API Sandbox when logged in a wiki site facilitates a lot this process but there's no easy way to reuse the request signature elsewhere.

Benefits (why should this be implemented?):
Ease the process of developing and testing mw API requests in different environments.