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marias1lva

MCP GraphQL Query Generator

by marias1lva

πŸš€ MCP GraphQL Query Generator

License: MIT TypeScript Bun VS Code GitHub Copilot

A smart Model Context Protocol (MCP) server that automatically discovers and generates GraphQL queries for any API. Works with VS Code + GitHub Copilot, CLI, and REST API to make exploring and using GraphQL APIs effortless.

Perfect for VS Code integration with GitHub Copilot! πŸ€–

Quick Start β€’ Features β€’ VS Code Setup β€’ API Reference β€’ Examples


What is MCP?

The Model Context Protocol (MCP) is a new protocol that lets tools, APIs, and models talk to each other in a structured way. Instead of manually copying data into your IDE or chat window, MCP servers can: - Provide real-time API access directly inside VS Code or AI tools. - Enable natural language queries ("show me all products with pagination"). - Act as connectors between AI assistants (like Copilot) and external systems. This project is an MCP server for GraphQL APIs: - It introspects any GraphQL schema. - Generates queries automatically. - Exposes them through CLI, REST, and VS Code integration. In short: you don’t need to handcraft GraphQL queries anymore β€” just ask, and they’re generated for you.

What is this?

This tool automatically introspects any GraphQL API and generates intelligent, production-ready queries with:

  • Auto-discovery of all available queries and types in your GraphQL API

  • Smart field selecion, including nested types

  • Table-formatted queries with pagination, filtering, and sorting

  • Natural language integration with GitHub Copilot

  • Zero configuration - just point it to your GraphQL endpoint

  • Multi-auth support (Bearer, API Key, Keycloak, etc.)

  • Multiple interfaces (CLI, REST API, MCP Server, Web UI)

Features

For Developers

  • Instant GraphQL exploration - No need to read documentation

  • Smart query generation - Automatically includes relevant fields

  • Production-ready queries - With proper pagination and error handling

  • Type-safe - Full TypeScript support

For AI Integration

  • GitHub Copilot integration - Ask questions in natural language

  • VS Code extension ready - Works globally across all projects

  • Context-aware - Understands your API structure

  • Intelligent suggestions - Based on your schema

For Teams

  • Consistent query patterns - Standardized across projects

  • Documentation generator - Auto-generates API insights

  • Multi-environment - Dev, staging, prod configurations

  • Docker ready - Easy deployment and scaling

Quick Start

Transform VS Code into a GraphQL powerhouse in 2 minutes:

# 1. Install Bun runtime (faster than Node.js)
powershell -c "irm bun.sh/install.ps1 | iex"

# 2. Clone and install globally
git clone https://github.com/marias1lva/mcp-graphql-generator.git
cd mcp-graphql-generator
.\install-global.ps1

# 3. Add to VS Code settings.json:
{
  "mcp.servers": {
    "graphql-query-generator": {
      "name": "GraphQL Query Generator",
      "url": "http://localhost:3001",
      "enabled": true
    }
  }
}

# 4. Configure your API
notepad %APPDATA%\MCPGraphQLServer\.env
# Add: GRAPHQL_API_URL=https://your-api.example.com/graphql

That's it! Now ask GitHub Copilot: "List available GraphQL queries"

Option 2: Local Development

# Clone and setup
git clone https://github.com/marias1lva/mcp-graphql-generator.git
cd mcp-graphql-generator
bun install

# Configure API
cp .env.example .env
# Edit .env with your GraphQL API URL

# Start MCP server
bun mcp-server.ts

# Or use CLI directly
bun src/cli.ts list
bun src/cli.ts generate listUsers

VS Code Integration

Once installed, use natural language with GitHub Copilot:

πŸ‘€ "List all available GraphQL queries"
πŸ€– Found these queries:
   β€’ listUsers - Get all users with pagination
   β€’ listProducts - Browse products catalog  
   β€’ listOrders - View order history

πŸ‘€ "Generate a query to get users with their profiles"
πŸ€– query ListUsers($first: Int, $after: String) {
     listUsers(first: $first, after: $after) {
       edges {
         node {
           id
           name
           email
           profile {
             firstName
             lastName
             avatar
           }
         }
       }
       pageInfo {
         hasNextPage
         endCursor
       }
     }
   }

πŸ‘€ "What fields are available in the Product type?"
πŸ€– Product type fields:
   β€’ id (ID!) - Unique identifier
   β€’ name (String!) - Product name
   β€’ price (Float!) - Product price
   β€’ description (String) - Product description
   β€’ category (Category) - Product category

Usage Options

1. CLI Interface

# Discover available queries
bun src/cli.ts list

# Generate a specific query
bun src/cli.ts generate listUsers

# Generate with options
bun src/cli.ts generate listProducts --depth 3 --pagination

# Interactive mode
bun src/cli.ts interactive

2. REST API

### Get all available queries
GET http://localhost:3001/mcp/queries

### Generate a specific query
POST http://localhost:3001/mcp/generate-query
Content-Type: application/json

{
  "queryName": "listUsers",
  "options": {
    "includePagination": true,
    "maxDepth": 2,
    "selectedFields": ["id", "name", "email"]
  }
}

### Analyze a type
GET http://localhost:3001/mcp/analyze/User

3. Programmatic Usage

import { GenericQueryGenerator } from './src/generators/genericQueryGenerator';

const generator = new GenericQueryGenerator();

// Get available queries
const queries = await generator.getAvailableQueries();

// Generate a table query
const query = await generator.generateTableQuery('listUsers', {
  includePagination: true,
  maxDepth: 2
});

// Generate custom query
const customQuery = await generator.generateCustomQuery('listUsers', 
  ['id', 'name', 'email'], 
  { includePagination: true }
);

Configuration

Environment Variables

# Required: Your GraphQL API endpoint
GRAPHQL_API_URL=https://your-api.example.com/graphql

# Optional: Authentication
API_TOKEN=your_bearer_token
API_KEY=your_api_key

# Optional: Keycloak authentication
KEYCLOAK_CLIENT_ID=your_client_id
KEYCLOAK_CLIENT_SECRET=your_client_secret
KEYCLOAK_URL=https://your-keycloak.example.com/auth
KEYCLOAK_REALM=your-realm

# Optional: Server configuration
MCP_PORT=3001
MAX_DEPTH=3

Per-Project Configuration

Create .vscode/settings.json in your project:

{
  "mcpGraphQL.projectSettings": {
    "apiUrl": "https://project-specific-api.com/graphql",
    "authToken": "${env:PROJECT_API_TOKEN}",
    "defaultDepth": 2,
    "enablePagination": true
  }
}

Examples

Example Output - List Users Query

query ListUsers($first: Int, $after: String, $orderBy: UserOrderByInput) {
  listUsers(first: $first, after: $after, orderBy: $orderBy) {
    edges {
      node {
        id
        name
        email
        createdAt
        profile {
          firstName
          lastName
          avatar
        }
      }
    }
    pageInfo {
      hasNextPage
      hasPreviousPage
      startCursor
      endCursor
    }
    totalCount
  }
}

Example Output - Products with Categories

query ListProducts($first: Int, $after: String, $filters: ProductFiltersInput) {
  listProducts(first: $first, after: $after, filters: $filters) {
    edges {
      node {
        id
        name
        price
        description
        category {
          id
          name
          slug
        }
        images {
          url
          alt
        }
      }
    }
    pageInfo {
      hasNextPage
      endCursor
    }
  }
}

Architecture

mcp-graphql-generator/
β”œβ”€β”€ src/
β”‚   β”œβ”€β”€ cli.ts                     # Command line interface
β”‚   β”œβ”€β”€ app.ts                     # HTTP server entry point
β”‚   β”œβ”€β”€ generators/
β”‚   β”‚   └── genericQueryGenerator.ts  # Core query generation logic
β”‚   β”œβ”€β”€ services/
β”‚   β”‚   β”œβ”€β”€ graphqlIntrospection.ts   # API discovery service
β”‚   β”‚   └── keycloakAuth.ts           # Authentication service
β”‚   β”œβ”€β”€ mcp/
β”‚   β”‚   └── server.ts                 # MCP protocol server
β”‚   β”œβ”€β”€ config/
β”‚   β”‚   └── credentials.ts            # Credential management
β”‚   └── types/
β”‚       β”œβ”€β”€ auth.ts                   # Authentication types
β”‚       └── env.d.ts                  # Environment types
β”œβ”€β”€ mcp-server.ts              # MCP server entry point
β”œβ”€β”€ install-global.ps1         # Global VS Code installation
β”œβ”€β”€ configure-autostart.ps1    # Auto-start configuration
β”œβ”€β”€ docker-compose.global.yml  # Docker deployment
└── docs/                      # Additional documentation

Docker Deployment

# docker-compose.yml
version: '3.8'
services:
  mcp-server:
    build: .
    ports:
      - "3001:3001"
    environment:
      - GRAPHQL_API_URL=https://your-api.example.com/graphql
      - API_TOKEN=your_token
    restart: unless-stopped
# Deploy with Docker
docker-compose up -d

# Or with Docker directly
docker build -t mcp-graphql-generator .
docker run -p 3001:3001 -e GRAPHQL_API_URL=https://your-api.com/graphql mcp-graphql-generator

API Compatibility

Works with any GraphQL API that supports introspection, including:

  • βœ… Apollo Server - Full compatibility

  • βœ… GraphQL Yoga - Full compatibility

  • βœ… Hasura - Including metadata queries

  • βœ… Postgraphile - Auto-generated CRUD

  • βœ… AWS AppSync - With custom resolvers

  • βœ… Shopify Admin API - E-commerce queries

  • βœ… GitHub GraphQL API - Repository data

  • βœ… Strapi GraphQL - Headless CMS

  • βœ… Contentful - Content management

  • βœ… Custom GraphQL APIs - Any introspection-enabled API

Development

Setup Development Environment

# Clone repository
git clone https://github.com/marias1lva/mcp-graphql-generator.git
cd mcp-graphql-generator

# Install dependencies
bun install

# Copy environment template
cp .env.example .env
# Edit .env with your test GraphQL API

# Start in development mode
bun --watch mcp-server.ts

# Run CLI in development
bun --watch src/cli.ts list

# Build for production
bun build

# Run tests (when implemented)
bun test

Project Scripts

{
  "scripts": {
    "start": "bun src/app.ts",
    "dev": "bun --watch mcp-server.ts", 
    "build": "bun build",
    "cli": "bun src/cli.ts",
    "cli:list": "bun src/cli.ts list",
    "cli:interactive": "bun src/cli.ts interactive"
  }
}

Contributing

We welcome contributions! Here's how to get started:

  1. Fork the repository

  2. Create your feature branch (git checkout -b feature/amazing-feature)

  3. Make your changes with proper TypeScript types

  4. Test your changes with a real GraphQL API

  5. Commit your changes (git commit -m 'Add amazing feature')

  6. Push to the branch (git push origin feature/amazing-feature)

  7. Open a Pull Request

Contribution Guidelines

  • TypeScript - All code must be properly typed

  • Bun - Use Bun for package management and runtime

  • Testing - Include tests for new features

  • Documentation - Update README and inline docs

  • Code Style - Follow existing patterns

License

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

Acknowledgments


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