Related Standards

OAuth 2.0 Client Credentials Grant https://datatracker.ietf.org/doc/html/rfc6749#section-4.4
JSON Web Token (JWT) https://datatracker.ietf.org/doc/html/rfc7519

OAuth 2.0 User Assertion

Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants

https://datatracker.ietf.org/doc/html/rfc7521
OAuth 2.0 Authorization Code Grant https://datatracker.ietf.org/doc/html/rfc6749#section-4.1