Hi @Louis
Your topic title says you're using one endpoint, but your code example says you're using a different.
POST /api/card/:card-id/query is not the same endpoint as POST /api/card/:card-id/query/:export-format
https://www.metabase.com/docs/latest/api-documentation.html#post-apicardcard-idqueryexport-format
Have a look here: API POST /api/card/:card-id/query/:export-format with parameters