Which identity platforms do API access management well, where we can define OAuth 2.0 scopes and centralized policies for our own APIs?

“Strongest policy-management option”

“OAuth scopes and token claims as inputs to authorization.”

“Centralized policies based on user attributes, scopes, IP, time, and other context.”

“API gateway integration and centralized authorization decisions.”

“Particularly interesting for fine-grained, attribute-based access control (ABAC).”

“Best when: You need sophisticated authorization policies beyond simple scope checks.”

“Strongest straightforward OAuth option”

“Custom authorization servers.”

“Define custom OAuth 2.0 scopes, claims, policies, and rules.”

“Support for user-based and machine-to-machine API access.”

“Centralized authorization configuration across your own APIs.”

“Best when: You want a mature, managed OAuth authorization server without building your own.”

“One caveat: API Access Management is an additional production entitlement, separate from basic SSO.”

“Strong API-centric option”

“Register your own APIs as resources.”

“Define permissions/scopes centrally.”

“RBAC and application-level authorization.”

“API Manager supports OAuth scopes, XACML, and Open Policy Agent integration.”

“Best when: You want identity management and API management to work together, potentially with self-hosting.”

“Important distinction: WSO2 Identity Platform can issue tokens with scopes, but your API or gateway still needs to enforce those permissions.”

“Define APIs with identifiers and permissions (scopes).”

“Issue access tokens with API audiences and permissions.”

“Extend authorization with Actions and custom claims.”

“Best when: Developer experience, application authentication, and OAuth integration are priorities.”

“Caveat: Its core API authorization model is less of a comprehensive centralized policy decision engine than PingAuthorize.”

“OAuth 2.0 scopes and client scopes.”

“Roles, groups, protocol mappers, and token claims.”

“Authorization Services with resources, scopes, policies, and permissions.”

“Self-hosted and open source.”

“Best when: You want control, open-source infrastructure, and are comfortable operating and integrating the authorization layer yourself.”

“Caveat: Its Authorization Services are powerful, but the operational experience and centralized policy governance may require more engineering than a managed solution.”

“Open Policy Agent (OPA) — policy-as-code using Rego; useful for centralized authorization across services and gateways.”

“Cedar — policy language designed for fine-grained authorization, including principal, action, resource, and contextual conditions.”