Learn more about token endpoint authentication methods in Client Authentication in the OIDC specification. PingOne supports the following token endpoint authentication methods:

CLIENT_SECRET_POST
Include the client credentials in the HTTP request body.
CLIENT_SECRET_BASIC
Include the client credentials using the HTTP Basic authentication scheme.
CLIENT_SECRET_JWT
Create a digitally signed JSON Web Token (JWT) using HS256, HS384, or HS512.
PRIVATE_KEY_JWT
Create a digitally signed JWT using RS256, RS384, or RS512 with a private key owned by the application or resource server.