Howdy @jwren ,
Strictly speaking, from a technical aspect there isn’t really a way to automatically log you into absolutely all SSO web apps (aka Service Providers or SP) at once as soon as someone logs into the Identity Provider (IdP), unless the IdP is on the same platform as the SP. That’s why - for example - logging into Gmail automatically logs you into YouTube, or logging into Jira logs you into Confluence/Trello/Statuspage/Bitbucket automatically - because they share the same platform and/or internal IdP. It ultimately only works “automagically” because you’re basically logged into the same account across those specific apps, whereas if you then come over to Gainsight CC, you’re logging into a different app and account entirely.
That’s not really possible when it goes between platforms - for pretty complicated technical reasons it has to be the result of a user action. However, if you’re already logged into the IdP when you attempt to SSO into something that it manages access for, it’ll go through almost instantly anyway because the IdP already knows who you are and will usually skip the request for credentials.
The API for Gainsight CC also doesn’t support remote login, only remote logout per https://api2-eu-west-1.insided.com/docs/user/#tag/User/operation/remoteLogout
Hope that helps