By request we have extended our implementation of the RESO Web API spec to include an “unselect” parameter.
This works in the same way that the “select” parameter does, except instead of having the API response only include the selected fields, it will return all fields except those specified.
For example, to return all fields except the Media object:
https://api.bridgedataoutput.com/api/v2/OData/{dataset_code}/Properties?access_token={access_token}&$unselect=Media