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2025-04-10

A Model Context Protocol (MCP) server providing tools to read, search, and manipulate OpenFGA stores programmatically via Large Language Models (LLMs.)

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OpenFGA MCP Server

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An experimental Model Context Protocol (MCP) server that enables Large Language Models (LLMs) to read, search, and manipulate OpenFGA stores. Unlocks authorization for agentic AI, and fine-grained vibe coding✨ for humans.

Requirements

Features

Tools

Store Management

  • create_store: Creates a new Store. (create-store)
  • list_stores: List all stores. (list-stores)
  • get_store: Get a store details. (get-store)
  • delete_store: Delete a store. (delete-store)
  • get_store_id_by_name: Get the ID of a store by it's name.

Authorization Model Management

Relationship Tuples Management

Relationship Queries

  • check: Check if a user has a relation to an object. (check)
  • list_objects: List objects of a type that a user has a relation to. (list-objects)
  • list_users: List users that have a given relationship with a given object. (list-users)

Resources

Prompts

Usage

We recommend running the server using UVX:

uvx openfga-mcp@latest

Installing via Smithery

To install OpenFGA MCP Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @evansims/openfga-mcp --client claude

Configuration

The server accepts the following arguments:

  • --openfga_url: URL of your OpenFGA server
  • --openfga_store: ID of the OpenFGA store the MCP server will use
  • --openfga_model: ID of the OpenFGA authorization model the MCP server will use

For API token authentication:

  • --openfga_token: API token for use with your OpenFGA server

For Client Credentials authentication:

  • --openfga_client_id: Client ID for use with your OpenFGA server
  • --openfga_client_secret: Client secret for use with your OpenFGA server
  • --openfga_api_issuer: API issuer for use with your OpenFGA server
  • --openfga_api_audience: API audience for use with your OpenFGA server

For example:

uvx openfga-mcp@latest \
  --openfga_url="http://127.0.0.1:8080" \
  --openfga_store="your-store-id" \
  --openfga_model="your-model-id"

Using with Claude Desktop

To configure Claude to use the server, add the following to your Claude config:

{
  "mcpServers": {
    "openfga-mcp": {
      "command": "uvx",
      "args": ["openfga-mcp@latest"]
    }
  }
}
  • You may need to specify the full path to your uvx executable. Use which uvx to find it.
  • You must restart Claude after updating the configuration.

Using with Raycast

Using with Cursor

Using with Windsurf

Development

To setup your development environment, run:

make setup

To run the development server:

make run \
  --openfga_url="http://127.0.0.1:8080" \
  --openfga_store="your-store-id" \
  --openfga_model="your-model-id"

To run the development server with the MCP Inspector:

make dev

License

Apache 2.0

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    Reviews

    5 (1)
    Avatar
    user_EPhGkMgN
    2025-04-16

    Openfga-mcp by evansims is an outstanding tool for managing fine-grained access control in modern applications. Its integration and flexibility are unparalleled, ensuring robust security measures. The documentation is thorough and the community support on GitHub is tremendously helpful. Highly recommend it for those in need of an efficient authorization system!