The Single Sign-On APIs allow you to manage your SAML 2.0 SSO configurations. You can also work with your SSO integrations using the SSO section of the Twilio SendGrid App.
The Certificates API allows you to create, modify, and delete SSO certificates. A SAML certificate allows your IdP and Twilio SendGrid to verify requests are coming from one another using the public_certificate and integration_id parameters.
For more information about managing SSO Certificates, see the Twilio SendGrid SSO documentation.