To add the document link on top of @gmadala 's point, here you go: url
In the request you have to pass the datasetId as the input parameter along with an extra query parameter as "properties" with value="observableSchema".
Final url will look like: https://platform.adobe.io/data/foundation/catalog/dataSets/<datasetId>?properties=observableSchema
And then loop through the response.
Please note:
this process works based on the "preview dataset". If you have added a new column in the schema, but that column do not have the data yet, this response will not show up in the response