BI Book uses API keys to allow access to the API. There are three ways to authenticate to your BI Book API and all of them can be found in your BI Book under Company management > API Keys, as shown in the picture below. Contact us at if you cannot find these and we'll enable them for you. 

The three ways to authenticate to the BI Book API:

It is highly recommended that you use the parameter token as a last option as it can be a significant information security risk by falling in to the wrong hands. However, if this would happen you could regenerate the BI Book API Token by clicking on the round arrow next to the API token.