Overview#Revocation_endpoint is an OAuth 2.0 Endpoint that represents fully qualified URL of the server’s revocation endpoint and is described in OAuth 2.0 Token Revocation (RFC 7009).
Revocation_endpoint is defined in OpenID Connect
RFC 7009 states "The OAuth Client requests the revocation of a particular token by making an HTTP POST request to the token Revocation_endpoint URL. This URL MUST conform to the rules given in RFC 6749, Section 3.1. OAuth Clients MUST verify that the URL is an HTTPS URL.