It is allowed to retrieve information from posts and pages, categories, tags and comments, among other resources.
The available Endpoints correspond to the documentation for developers of the WordPress REST API, available at https://developer.wordpress.org/rest-api/reference/#rest-api-developer-endpoint-reference with the mask https://cstrack.eu/wp-json
For example, to retrieve all categories you should use https://cstrack.eu/wp-json/wp/v2/categories
For each resource, the corresponding schema and the arguments to retrieve the contents in a specific way are indicated in the documentation.
Through API development platforms such as Postman, Endpoints can be tested and the arguments adjusted to retrieve the desired content.