API specification file with actual data

I have my API Security product. I want the customer to upload an API specification file from which I can perform further things. But for that, I want an API specification file with actual data like if it has /balance endpoint then I want the actual API Key as well as the value of all the required parameters.

The main question is how the customer can add the actual API key and values for the required parameters in the Swagger JSON file. 

The value property doesn't parse while parsing the Swagger JSON file.