Okta SAML and Keycloak for ID-JAG Cross App Access

This article details the Identity Assertion JWT Authorization Grant (ID-JAG) draft for Cross-App Access (XAA), which standardizes how enterprises broker API and MCP resource access across identity boundaries. It contrasts SSO with ID-JAG, explaining that SSO only identifies users while ID-JAG converts enterprise identity into scoped OAuth tokens under IdP policy. The article provides a step-by-step flow and a working example using Okta as the enterprise IdP (with SAML) and Keycloak as the resource authorization server, emphasizing interoperability. It includes a demo video and references a reproducible GitHub repository. The content is technical, focused on identity federation, OAuth, SAML, and token exchange, making it relevant to IT/technology professionals.