Hello @Efigiann
To return only defined properties, you can use the properties query parameter. For example, the following request will return only the defined properties for the companies object
https://api.hubspot.com/crm/v3/companies?properties=name,hs_object_id
The properties query parameter can take a comma-separated list of property names. You can also use the * wildcard to return all defined properties.
how to use the * wildcard
https://api.hubspot.com/crm/v3/companies?properties=*
This request will return all defined properties for the companies object.