I am working with Single Sign-On (SSO) using SAML for multiple SaaS applications. Each SaaS provider requires different attribute mappings (for example: email, firstName, lastName, NameID, etc.).
I want to know if there is any centralized documentation or library that lists the SAML attributes (or required parameters) for popular SaaS applications in one place. For instance, does Okta, Azure AD, or another identity provider publish a catalog of attribute mappings for their supported SaaS apps?
My goal is to avoid checking each vendor’s SAML documentation separately and instead find a consolidated reference. If such a library does not exist, are there APIs (like Okta’s App Integration Catalog) that can be used to collect this information automatically?