- Client Credentials - The simplest authentication type for API keys, basic auth, or custom tokens
- OAuth2 - Standard protocol for third-party authorization without sharing credentials
- OAuth1 - Older authorization protocol with signature-based request authentication (rarely used)
- Proxy - Authenticates with parameters provided by Membrane (so you don’t have to register your own OAuth apps). Available only for some applications.
- Membrane Token - Uses Membrane’s token system - typically used for internal connectors or services that are aware of Membrane.