> ## Documentation Index
> Fetch the complete documentation index at: https://openfga.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# OpenFGA Use Cases

> Production-ready OpenFGA patterns for AI agents, RAG, MCP servers, multi-tenant SaaS, and microservices authorization.

OpenFGA is a Zanzibar-style relationship engine. The patterns below are the ones that show up most often in production — each links to the modeling guide and, where available, an adopter reference that runs the pattern at scale.

## AI and agent authorization

* **[AI agent authorization](/docs/use-cases/ai-agent-authorization)** — modeling agents as principals, delegating user permissions, and bounding what an autonomous agent can do.
* **[RAG authorization](/docs/use-cases/rag-authorization)** — filtering retrieved documents by the user's permissions before they reach the model.
* **[MCP server authorization](/docs/use-cases/mcp-server-authorization)** — enforcing tool and resource access in a Model Context Protocol server.

## Application authorization

* **[Multi-tenant SaaS](/docs/use-cases/multi-tenant-saas)** — one OpenFGA store, many tenants, with strict isolation.
* **[Microservices authorization](/docs/use-cases/microservices-authorization)** — a central authorization service that every microservice consults, instead of each service rolling its own roles table.