The Ruby script will use the apis.guru API to grab a list of Swagger API URLs. It will then call each API URL and extract the API paths, remove some stuff we don't want, then save the API paths to a file. The API paths file is useful to discover hidden, or undocumented, API endpoints.
The api_paths.txt file contains the output of the Ruby script; a list of real-world API paths that can be used to discover hidden, or undocumented, API endpoints during penetration tests.