What is the API? How to set up?

What is API?  
API is a simple and powerful developing tool, an integration that helps users make the most of trade function of ViaBTC to your own app in a more rapid and efficient way.

How to extract API Key
1. Enter https://www.viabtc.com/ and navigate to [Settings].

2. Find [API Key] in the [Mining Setting].

3. Click [Check] next to [Secret Key] then enter the Email verification code and 6-digit GA code as required on the page. Once you're ready, hit [Next] to check the secret key corresponding of your current API.

4. To whitelist an IP address for your current API, click [Setup] next to [IP Whitelist] then enter the Email verification code and 6-digit GA code to proceed.

5. Hit [Next] to add IP whitelist.

You could follow the step-by-step tutorial to learn more about API settings through the link below,
 https://github.com/viabtc/viapool_api/wiki