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OpenAPI Analyzer

Analyzes OpenAPI specifications with seven core tools including spec loading, API listing, endpoint ...

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Updated Sep 9, 2025
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Analyzes OpenAPI specifications with seven core tools including spec loading, API listing, endpoint searching, statistics generation, inconsistency detection, and schema comparison for API documentation review, validation, and multi-API comparison workflows.
  1. Open the FastMCP connection interface
    Click the "Install Now" button to begin adding your OpenAPI Analyzer MCP Server integration.

  2. Decide on your OpenAPI source
    Choose one of the following methods to provide your OpenAPI specifications (at least one is required):

    • Option 1 (Highest priority): An API registry URL (in apis.json format)
    • Option 2: A comma-separated list of OpenAPI specification URLs
    • Option 3: An absolute path to a local folder containing your OpenAPI spec files
  3. Fill in the environment variable(s) in the FastMCP interface

    • For an API registry, set:
      • Variable: OPENAPI_DISCOVERY_URL
      • Example value: https://docs.company.com/apis.json
    • For specific URL list, set:
      • Variable: OPENAPI_SPEC_URLS
      • Example value: https://api1.com/spec.yaml,https://api2.com/spec.json
    • For a local folder, set:
      • Variable: OPENAPI_SPECS_FOLDER
      • Example value: /absolute/path/to/openapi/specs
  4. Use absolute paths for folders
    If using a local folder, ensure the path you provide is absolute.

  5. Save your configuration
    Once you have filled out the desired environment variable(s), save the configuration in the FastMCP interface.

  6. Restart Claude Desktop or your MCP client (if needed)
    For the changes to take effect, you may need to restart your client application.

  7. Test the integration
    Try running a query or tool (like "List loaded APIs" or "Get API overview") to confirm your OpenAPI specifications were loaded successfully.

Notes:

  • You only need to provide one type of source, but you may fill in more than one for automatic fallback.
  • Make sure all URLs are publicly accessible from where the integration is running.
  • JSON, YAML, and YML formats are supported.
  • For more details or troubleshooting, refer to the "Troubleshooting" section in the OpenAPI Analyzer MCP Server documentation.

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