Data API
Authentication
The Data API are used programmatically not on behalf of the user. This means that you can use one of the standard API Keys you create in the App Studio section of the Developer Portal. Pick the right API Key type (Server side or Client side) based on your specific tech stack. If you are uncertain on which type is the right one you can read more here.
Header example: Authorization = Bearer + api_key
Permissions
Using the Data API, you can access all publicly available information on faceit.com