I’m having a similar issue. I’ve seen elsewhere the suggestion to create an API endpoint and use ‘return data from API’ and querying that via API connector so you may want to give that a shot.

I made it that far and was able to produce the results internally as a result but when I tried to use those results as input for the 3rd party service I wanted to query I just receive errors trying to send the entire response as a string and if you select JSON in the api connector than you are back to square one and only able to send one piece of the Thing.

If anyone has input on this or suggestions to try please let me know…