There are multiple options how an SP can make use of the Discovery Service. The simplest one is to just redirect users to the Discovery Service URL, which we call "central discovery".
The DSX Discovery Service (formerly known as eduTEAMS Discovery Service) allows services to implement an (embedded) Identity Provider discovery.
Currently, the service is in a pilot phase, therefore some aspects of the service still may change.
This section contains functional and technical documentation on how to use the discovery service if you are a administrator of a service.
Use Central Discovery
For this very basic adoption using the DSX Discovery Service as central discovery service, everything an SP needs to know is the URL that the discovery service uses to serve SAML2 IdP discovery requests. Consult the documentation of the SAML SP product you are using on how to apply Discovery Service URL. If you are for example using the Shibboleth SP, consult the Shibboleth documentation or in case of SimpleSAMLphp the SimpleSAMLphp documentation on this topic. Generic information on the SAML2 IdP Discovery Service protocol are available in the Identity Provider Discovery Service Protocol and Profile.