Support delegated authorization for third parties accessing structured vehicle event APIs. What do you implement?

Delegated authorization for third parties is best handled by OAuth. OAuth allows a user to grant a third-party application limited access to their resources on another service without sharing their credentials. This is crucial for structured vehicle event APIs, where third parties need specific, scoped access without full account control. SAML 2.0 SSO is for authentication (verifying identity), not delegated authorization. Restricting by source IP address is a security measure, not an authorization mechanism, and is inflexible for dynamic third-party access. Creating secondary credentials for each dealer to share is insecure and unmanageable, as it bypasses proper authorization flows and creates credential sprawl.