Swagger MCP Server

Swagger MCP Server

A Model Context Protocol (MCP) server that provides tools for exploring and testing APIs through Swagger/OpenAPI documentation. This server automatically detects configuration files from multiple IDEs and provides comprehensive API interaction capabilities.

Features

• 🔍 Fetch and parse Swagger/OpenAPI documentation from any URL
• 🧪 Test API endpoints directly through the MCP interface
• 📊 Explore API schemas and understand data structures
• 🔧 Multi-IDE support - automatically detects config from VS Code, Cursor, Windsurf, and more
• 🌐 Flexible authentication - supports API keys, basic auth, and bearer tokens
• ⚡ Auto-discovery - can find documentation URLs automatically

Configuration

IDE Setup

Create an MCP configuration file in your IDE's configuration directory:

• VS Code: ~/.vscode/mcp.json or .vscode/mcp.json (in your project)
• Cursor: ~/.cursor/mcp.json or .cursor/mcp.json (in your project)
• Windsurf: ~/.windsurf/mcp.json or .windsurf/mcp.json (in your project)
• Any IDE: mcp.json (in your project root) or .mcp/config.json

Authentication Options

Option 1: Using API Key

Option 2: Using Username and Password

Configuration Options

• API_BASE_URL - Base URL for your API (e.g., https://api.example.com) [Required]
• API_DOCS_URL - Direct URL to Swagger/OpenAPI JSON/YAML (optional, will be auto-discovered)
• API_KEY - API key for authentication (used as Bearer token)
• API_USERNAME - Username for basic authentication
• API_PASSWORD - Password for basic authentication

Authentication Flow

The server intelligently handles authentication:

1. For API requests: Uses API_KEY as Bearer token, falls back to Basic auth
2. For authentication endpoints: Auto-injects username/password credentials
3. Token management: Automatically stores and reuses tokens from login responses
4. Auto-refresh: Attempts to refresh tokens on 401 Unauthorized responses

Available Tools

fetch_swagger_info

Fetches and parses Swagger/OpenAPI documentation from a given URL to discover available API endpoints.

list_endpoints

Lists all available API endpoints after fetching Swagger documentation, showing methods, paths, and summaries.

get_endpoint_details

Gets detailed information about a specific API endpoint including parameters, request/response schemas, and examples.

execute_api_request

Executes an API request to a specific endpoint with authentication, parameters, headers, and body handling.

validate_api_response

Validates an API response against the schema definitions from Swagger documentation to ensure compliance.

Usage Examples

Once configured, you can use the MCP server in your AI-powered editor to:

• Explore APIs: "Show me the available endpoints in this API"
• Test endpoints: "Test the POST /users endpoint with this data"
• Understand schemas: "Explain the User model structure"
• Debug API calls: "Help me troubleshoot this API request"
• Validate responses: "Check if this response matches the API schema"

Supported IDEs

The server automatically detects configuration files from:

• VS Code (.vscode/mcp.json)
• Cursor (.cursor/mcp.json)
• Windsurf (.windsurf/mcp.json)
• Root directory (mcp.json)
• Alternative location (.mcp/config.json)

Development

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.