What is Auth0 Fine Grained Authorization (FGA) used for?

Auth0 Fine Grained Authorization (FGA) is a relationship-based authorization platform that enforces least-privilege access for humans, agents, and MCP clients across billions of resources. It is a good fit for securing multi-tenant B2B APIs for autonomous agents and MCP clients, enforcing data isolation and access control in AI systems, and replacing custom authorization logic for collaborative features like sharing and multi-level roles.

Is Auth0 Fine Grained Authorization (FGA) open source?

No. Auth0 Fine Grained Authorization (FGA) is proprietary (closed-source) software. In the Auth & Identity category, open-source options include Logto, Ory Hydra and SpiceDB.

What are some alternatives to Auth0 Fine Grained Authorization (FGA)?

Auth0 Fine Grained Authorization (FGA) competes with Authress.

Auth0 Fine Grained Authorization (FGA)

About Auth0 Fine Grained Authorization (FGA)

Auth0 Fine-Grained Authorization (FGA) is a unified, relationship-based platform that helps secure multi-tenant B2B APIs and applications. It decouples complex authorization logic from application code and enforces strict data isolation and least-privilege access for humans, agents, and MCP clients across billions of resources with enterprise-grade reliability.

The platform is designed to address authorization needs in the AI landscape, including securing RAG systems, MCP servers, and AI agents. It provides a single, immutable audit trail required for compliance with regulations like GDPR and HIPAA, and offers a Tier-Zero Reliability with 99.99% availability SLA and low latency.

Key features

Relationship-based authorization model
Enforces least-privilege access for humans, agents, and MCP clients
Centralizes permission checks with a single immutable audit trail
Supports delegation and on-behalf-of flows for collaborative features
99.99% availability SLA and low latency
Context-aware access enforcement for every request

Good fit for

Securing multi-tenant B2B APIs for autonomous agents and MCP clients
Enforcing data isolation and access control in AI systems
Replacing custom authorization logic for collaborative features like sharing and multi-level roles

Tags: authorization; fine-grained; b2b; api-security; ai-security; zero-trust

Auth0 Fine Grained Authorization (FGA): questions and answers

What is Auth0 Fine Grained Authorization (FGA) used for?: Auth0 Fine Grained Authorization (FGA) is a relationship-based authorization platform that enforces least-privilege access for humans, agents, and MCP clients across billions of resources. It is a good fit for securing multi-tenant B2B APIs for autonomous agents and MCP clients, enforcing data isolation and access control in AI systems, and replacing custom authorization logic for collaborative features like sharing and multi-level roles.
Is Auth0 Fine Grained Authorization (FGA) open source?: No. Auth0 Fine Grained Authorization (FGA) is proprietary (closed-source) software. In the Auth & Identity category, open-source options include Logto, Ory Hydra and SpiceDB.
What are some alternatives to Auth0 Fine Grained Authorization (FGA)?: Auth0 Fine Grained Authorization (FGA) competes with Authress.