Split requires users to authenticate API requests by providing a key.
In Split there are three types of keys:
SDK - recommended to be used with SDKs that live in your infrastructure (for example your servers)
Browser - a subtype of SDK keys for SDKs living in public environments (e.g. browsers or mobile clients)
Admin - used for access to Split developer APIs.
Keep your SDK and Admin keys private
If you accidentally expose your API key, you can reset it in the APIs tab in Organization Settings.