README

OpenFGA MCP Server

AI-powered authorization management for OpenFGA

Connect OpenFGA and Auth0 FGA to AI agents via the Model Context Protocol.

Use Cases

Plan & Design - Design efficient authorization model using best practice patterns
Generate Code - Generate accurate SDK integrations with comprehensive documentation context
Manage Instances - Query and control live OpenFGA servers through AI agents

Quick Start

Offline Mode (Default)

Design models and generate code without a server:

{
  "mcpServers": {
    "OpenFGA": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "--pull=always",
        "evansims/openfga-mcp:latest"
      ]
    }
  }
}

Online Mode

Connect to OpenFGA for full management capabilities:

{
  "mcpServers": {
    "OpenFGA": {
      "command": "docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "--pull=always",
        "-e",
        "OPENFGA_MCP_API_URL=http://host.docker.internal:8080",
        "evansims/openfga-mcp:latest"
      ]
    }
  }
}

Safety: Write operations are disabled by default. Set OPENFGA_MCP_API_WRITEABLE=true to enable.

Docker Networking: For your OPENFGA_MCP_API_URL use host.docker.internal when running OpenFGA on your local machine, container names for Docker networks, or full URLs for remote instances.

Works with Claude Desktop, Claude Code, Cursor, Windsurf, Zed, and other MCP clients.

Configuration

MCP Transport

Variable	Default	Description
`OPENFGA_MCP_TRANSPORT`	`stdio`	Supports `stdio` or `http` (Streamable HTTP.)
`OPENFGA_MCP_TRANSPORT_HOST`	`127.0.0.1`	IP to listen for connections on. Only applicable when using `http` transport.
`OPENFGA_MCP_TRANSPORT_PORT`	`9090`	Port to listen for connections on. Only applicable when using `http` transport.
`OPENFGA_MCP_TRANSPORT_SSE`	`true`	Enables Server-Sent Events (SSE) streams for responses.
`OPENFGA_MCP_TRANSPORT_STATELESS`	`false`	Enables stateless mode for session-less clients.

OpenFGA

Variable	Default	Description
`OPENFGA_MCP_API_URL`		OpenFGA server URL
`OPENFGA_MCP_API_WRITEABLE`	`false`	Enables write operations
`OPENFGA_MCP_API_STORE`		Default requests to a specific store ID
`OPENFGA_MCP_API_MODEL`		Default requests to a specific model ID
`OPENFGA_MCP_API_RESTRICT`	`false`	Restrict requests to configured default store/model

OpenFGA Authentication

Authentication	Variable	Description
Pre-Shared Keys	`OPENFGA_MCP_API_TOKEN`	API Token
Client Credentials	`OPENFGA_MCP_API_CLIENT_ID`	Client ID
	`OPENFGA_MCP_API_CLIENT_SECRET`	Client Secret
	`OPENFGA_MCP_API_ISSUER`	Token Issuer
	`OPENFGA_MCP_API_AUDIENCE`	API Audience

See docker-compose.example.yml for complete examples.

Features

Management Tools

Stores: Create, list, get, delete stores
Models: Create models with DSL, list, get, verify
Permissions: Check, grant, revoke permissions; query users and objects

SDK Documentation

Comprehensive documentation for accurate code generation:

All OpenFGA SDKs (PHP, Go, Python, Java, .NET, JavaScript, Laravel)
Class and method documentation with code examples
Advanced search with language filtering

AI Prompts

Design & Planning

Domain-specific model design
RBAC to ReBAC migration
Hierarchical relationships
Performance optimization

Implementation

Step-by-step model creation
Relationship patterns
Test generation
Security patterns

Troubleshooting

Permission debugging
Security audits
Least privilege implementation

Resources & URIs

openfga://stores - List stores
openfga://store/{id}/model/{modelId} - Model details
openfga://docs/{sdk}/class/{className} - SDK documentation
openfga://docs/search/{query} - Search documentation

Smart Completions

Auto-completion for store IDs, model IDs, relations, users, and objects when connected.

Contributing | Apache 2.0 License

evansims / openfga-mcp

Maintainers

Details