You can use API Discovery to create an API definition by sending corresponding requests from a web browser:
Select File > New Project.
– or –
On the Dashboard, click New Project on the New Test tile:
In the New Project dialog, switch to the REST Discovery tab.
To use ReadyAPI as a proxy, select Use an external client application or browser. This approach is more complex, but it allows you to create more versatile records.
To record requests with the internal browser, select Use the built-in browser. With this approach, you can start recording immediately.
Click OK to start discovering your API.