In many places, collections, tags, types, vendors and warehouses are presented as IDs. For many usages, you will need to load their title. You can do that with this endpoint:
GET api/v1/helpers
Also, if you wish to load anything specific (such as tags), you can load just that:
GET api/v1/helpers/tags

See a sample response in the right column.

{
  "collections": [
    {
      "id": 1,
      "title": "Collection",
      "is_auto": 0
    }
  ],
  "types": [
    {
      "id": 1,
      "title": "Type"
    }
  ],
  "vendors": [
    {
      "id": 1,
      "title": "Supplier 1"
    }
  ],
  "warehouses": [
    {
      "id": 1,
      "title": "Warehouse 1"
    },
    {
      "id": 2,
      "title": "Warehouse 2"
    },
    {
      "id": 3,
      "title": "Warehouse 3"
    }
  ]
}