About cURL
Client Uniform Resource Locator (cURL) is a command-line tool that developers use to transfer data to and from a server. At its most fundamental, cURL allows you to talk to a server by specifying the location (in the form of a URL) and the data that you want to send. cURL supports several different protocols, including HTTP and HTTPS and runs on almost every platform. This makes cURL ideal for testing REST API calls from almost any device (provided that the device has a command line and network connectivity).
To run a cURL command, specify curl followed by the URL from which you wish to retrieve data, for example:
curl https://<YOUR_HOSTNAME>.com/api/v1/attributes