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	Default	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.

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• Contributing | Apache 2.0 License