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Swagger/OpenAPI

Integrates with REST APIs through OpenAPI specifications to fetch documentation, explore endpoints, ...

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Updated Sep 9, 2025
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Integrates with REST APIs through OpenAPI specifications to fetch documentation, explore endpoints, execute authenticated requests, and validate responses with support for multiple authentication methods.
  1. Obtain the API Base URL and Swagger/OpenAPI Docs URL

    • Determine the base URL for the API you want to connect to (e.g., https://api.example.com).
    • (Optional) Obtain the direct URL to the Swagger/OpenAPI JSON or YAML documentation (e.g., https://api.example.com/swagger.json). If you don't have this, the service will attempt to auto-discover it.
  2. Choose Your Authentication Method

    • Decide if your API requires an API key or username/password for authentication.

    A. If your API uses an API Key:

    1. Find out how your API provides API keys (consult your API provider’s documentation or portal).
    2. Log in to your API provider's dashboard/portal.
    3. Locate the section for API tokens/keys (frequently found under "API", "Developers", "Access", or "Security").
    4. Create or view your API key.
    5. Copy the API key for use in the next steps.

    B. If your API uses Username and Password:

    1. Use your usual username and password registered with your API provider.
  3. Fill in the FastMCP Connection Interface

    • Go to the FastMCP connection interface.
    • Click "Install Now" for the Swagger MCP server.
    • Fill in the required ENV values:
      • API_BASE_URL: The base URL of your API.
      • API_DOCS_URL: (Optional) The direct Swagger/OpenAPI documentation URL, if available.
      • If using an API key:
        • API_KEY: Paste your copied API key.
      • If using username/password authentication:
        • API_USERNAME: Enter your username.
        • API_PASSWORD: Enter your password.
  4. Save the Configuration

    • Make sure all required fields are filled.
    • Save or apply the configuration in FastMCP.

After setup, you can use the Swagger MCP server in your IDE/AI editor to explore and interact with your API endpoints directly!

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