Hey @james36,
It is not possible to run a cURL-command from an action or as data (as far as I know), but it is possible to generate an API-call based on a cURL-command (see image below).
In case there are problems getting a API call to work in Bubble, I often create the call in Postman (postman.com) first and after that in Bubble. You can copy paste the cURL-statement from Postman in Bubble:
It will not always include all of the parameters (especially with POST-call if I remember correctly) but it will get you started.
Hope this helps,
Gerbert
MVP Design