This action uses the OAuth 2.0 authentication to validate incoming requests from clients. Mediator authorizes the OAuth 2.0 credentials (access token) against a list of all global consumers available in the Mediator.

If the access token value in the Authorization header cannot be authenticated as a valid Integration Server user (or if the Authorization header is not present in the request), a 500 SOAP fault is returned, and the client is presented with a security challenge. If the client successfully responds to the challenge, the user is authenticated. If the client does not successfully respond to the challenge, a WWW-Authenticate: OAuth response is returned and the invocation is not routed to the policy engine. As a result, no events are recorded for that invocation, and its key performance indicator (KPI) data are not included in the performance metrics.

If none of the authentication actions (HTTP Basic Authentication, NTLM Authentication or OAuth2 Authentication) is configured for a proxy API, Mediator forwards the request to the native API, without attempting to authenticate the request.