openfga-mcp

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

OpenFGA

OpenFGA Authentication

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