After the last release has improved the API documentation, the current version extended the JSON REST and GraphQL APIs.
The JSON:API includes the possibility to fetch type items for attributes, products, services and stocks on request. You only need to add attribute.type, product.type, service.type or stock.type to the "include" parameter of the relevant JSON REST URLs, e.g. &include=attribute.type for attribute endpoint requests. This will return the type item(s) for the attributes in the included section of the response and contains e.g. the translation of types for each language.
The GraphQL API has been extended be able to return and update all order related information. Now it's possible to manage orders completely by the GraphQL API instead of just retrieving basic information from orders.