The APIs.guru API functions as a directory of open source machine-readable web APIs that conform to the OpenAPI, or Swagger 2.0, description format. It is ideally an API Wikipedia featuring a collection of open source and publicly accessible RESTful APIs. Whether free or paid, an API must be editable by anyone, exist as a community-driven project, and provide data accessibility through the REST platform to qualify for inclusion in the APIs.guru. The API weeds out non-compliant private APIs, transforms a variety of formats to the Swagger 2.0 format, and fixes errors in addition to accommodating additional data and supporting daily specifications updates. The APIs.guru API returns responses in JSON format.