What is Mcp Graphql

MCP GraphQL is a server that implements the Model Context Protocol (MCP) to provide a standardized interface for interacting with GraphQL APIs, allowing seamless communication between MCP-compatible clients and GraphQL services.

Use cases

Use cases for MCP GraphQL include integrating GraphQL APIs into existing applications, enabling MCP-compatible clients to access GraphQL services, and simplifying the interaction with complex GraphQL queries without needing extensive schema definitions.

How to use

To use MCP GraphQL, you can run it as a command line tool using either uvx or pip. You need to specify the GraphQL API URL and optionally provide an authentication token.

Key features

Key features include exposing each GraphQL query as a distinct MCP tool, automatic matching of tool parameters to GraphQL query parameters, dynamic JSON schema generation, no schema definition required, configurable authentication methods, and automatic handling of complex GraphQL types.

Where to use

MCP GraphQL can be used in various fields where GraphQL APIs are utilized, including web development, mobile applications, and any system that requires efficient data retrieval and manipulation through GraphQL.

MCP GraphQL

An MCP (Model Context Protocol) server that enables interaction with GraphQL APIs.

Description

MCP GraphQL is a tool that implements the Model Context Protocol (MCP) to provide a standardized interface for interacting with GraphQL APIs. It automatically exposes each GraphQL query as a separate MCP tool, allowing MCP-compatible clients to seamlessly communicate with GraphQL services.

Features

• Each GraphQL query is exposed as a distinct MCP tool
• Tool parameters automatically match the corresponding GraphQL query parameters
• JSON schema for tool inputs is dynamically generated from GraphQL query parameters
• No schema definition required - simply provide the API URL and credentials
• Currently supports GraphQL queries (mutations support planned for future releases)
• Configurable authentication (Bearer, Basic, custom headers)
• Automatic handling of complex GraphQL types

Requirements

• Python 3.11 or higher

Installation

Using uv (recommended)

When using uv no specific installation is needed. We will
use uvx to directly run mcp-graphql.

Using pip

Alternatively you can install mcp-graphql via pip:

pip install mcp-graphql

Installation from source code

git clone https://github.com/your-username/mcp_graphql.git
cd mcp_graphql
pip install .

Usage

As a command line tool

Using uvx:

uvx mcp-graphql --api-url="https://api.example.com/graphql" --auth-token="your-token"

Using pip installation:

mcp-graphql --api-url="https://api.example.com/graphql" --auth-token="your-token"

or

python -m mcp_graphql --api-url="https://api.example.com/graphql" --auth-token="your-token"

Available options

• --api-url: GraphQL API URL (required)
• --auth-token: Authentication token (optional)
• --auth-type: Authentication type, default is “Bearer” (optional)
• --auth-headers: Custom authentication headers in JSON format (optional)

Example with custom headers:

mcp-graphql --api-url="https://api.example.com/graphql" --auth-headers='{"Authorization": "Bearer token", "X-API-Key": "key"}'

As a library

import asyncio
from mcp_graphql import serve

auth_headers = {"Authorization": "Bearer your-token"}
api_url = "https://api.example.com/graphql"

asyncio.run(serve(api_url, auth_headers))

Configuration

Configure for Claude.app

Add to your Claude settings:

How It Works

MCP GraphQL automatically:

1. Introspects the provided GraphQL API
2. Creates an MCP tool for each available GraphQL query
3. Generates JSON schema for tool inputs based on query parameters
4. Handles type conversions between GraphQL and JSON

When a tool is called, the server:

1. Converts the tool call parameters to a GraphQL query
2. Executes the query against the API
3. Returns the results to the MCP client

Planned Features

• Support for GraphQL mutations (with appropriate safeguards)
• Improved error handling and validation
• Additional optimizations based on specific GraphQL API implementations

Development

Setting up the development environment

# Create virtual environment using uv
uv venv

# Install dependencies
uv sync

Linting

ruff check .

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contributing

Contributions are welcome. Please feel free to submit a Pull Request or open an Issue.