You can copy the deployed API's URL from the Proxy URL field and then try accessing it by providing the zip, countrycode, and the appid parameters as part of the URL, as follows:

https://asdfqwert.azurewebsites.net/?zip=10001&countrycode=us&apikey=qwertyasdfg98765zxcv

Note: Please replace the highlighted text with your environment's specific values.