What are Keycloak's OAuth2 / OpenID Connect endpoints?

For Keycloak 1.2 the above information can be retrieved via the url

http://keycloakhost:keycloakport/auth/realms/{realm}/.well-known/openid-configuration

For example, if the realm name is demo:

http://keycloakhost:keycloakport/auth/realms/demo/.well-known/openid-configuration

An example output from above url:

{
    "issuer": "http://localhost:8080/auth/realms/demo",
    "authorization_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/auth",
    "token_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/token",
    "userinfo_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/userinfo",
    "end_session_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/logout",
    "jwks_uri": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/certs",
    "grant_types_supported": [
        "authorization_code",
        "refresh_token",
        "password"
    ],
    "response_types_supported": [
        "code"
    ],
    "subject_types_supported": [
        "public"
    ],
    "id_token_signing_alg_values_supported": [
        "RS256"
    ],
    "response_modes_supported": [
        "query"
    ]
}

Found information at https://issues.jboss.org/browse/KEYCLOAK-571

Note: You might need to add your client to the Valid Redirect URI list

With version 1.9.3.Final, Keycloak has a number of OpenID endpoints available. These can be found at /auth/realms/{realm}/.well-known/openid-configuration. Assuming your realm is named demo, that endpoint will produce a JSON response similar to this.

{
  "issuer": "http://localhost:8080/auth/realms/demo",
  "authorization_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/auth",
  "token_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/token",
  "token_introspection_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/token/introspect",
  "userinfo_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/userinfo",
  "end_session_endpoint": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/logout",
  "jwks_uri": "http://localhost:8080/auth/realms/demo/protocol/openid-connect/certs",
  "grant_types_supported": [
    "authorization_code",
    "implicit",
    "refresh_token",
    "password",
    "client_credentials"
  ],
  "response_types_supported": [
    "code",
    "none",
    "id_token",
    "token",
    "id_token token",
    "code id_token",
    "code token",
    "code id_token token"
  ],
  "subject_types_supported": [
    "public"
  ],
  "id_token_signing_alg_values_supported": [
    "RS256"
  ],
  "response_modes_supported": [
    "query",
    "fragment",
    "form_post"
  ],
  "registration_endpoint": "http://localhost:8080/auth/realms/demo/clients-registrations/openid-connect"
}

As far as I have found, these endpoints implement the Oauth 2.0 spec.

Actually link to .well-know is on the first tab of your realm settings - but link doesn't look like link, but as value of text box... bad ui design. Screenshot of Realm's General Tab