This module provides a Swagger/OpenAPI compliant document describing the enabled REST resources of your site.
If you desire to use Drupal core rest functionality with OpenApi.js, then this module is required to enable the population of resources.
drush dl openapi
The Open API specification document in JSON format that describes all of the
entity REST resources can be downloaded from, openapi/entities?_format=json.
Learn more about the Open API specification
@todo Use service provider to dyan