Request and response examples can be found on the API Product page, by clicking the API Reference tab and then scrolling down and clicking the Sample Request and the Sample Response buttons.

You can see the Request or Response entity definitions, and the Errors (message descriptions) - by clicking the appropriate links next to the sample buttons.

Also note that the .YAML file can be downloaded to provide more technical specifications. Alternatively, you can open an API development tool like Postman to get a sample code set. At the top-right of the page, click Run in Postman to access a pre-built sample collection.