In most cases your SAML SP software will work with the SAMLDS protocol that the OpenAthens discovery service expects and it is just a case of configuring it.
For both OpenAthens SP and OpenAthens Cloud SP, the procedure is the same.
See also: PLACEHOLDER
Add a discovery response binding to your metadata in the <Extensions> section- e.g:
<Extensions> ... <disco:DiscoveryResponse Binding="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol" Location="https://shibsp.yourdomain.com/Shibboleth.sso/DS" index="1"/> ... </Extensions>
PLACEHOLDER - ALSO DO WHATEVER THE THING IS THAT SENDS USERS TO THE DISCOVERY SERVICE IN THE FIRST PLACE