Not a dumb question at all! We do not currently have an API for Sigma. Although, its a great idea and good feedback for the Sigma team. Hope you find good use of its current incarnation. Thanks!
+1 for this. It would be cool to be able to save the queries and get them from an API request to feed into some other BI tool... it would almost act as a saved rdbms "views"
That's.. disappointing to hear, and actually getting me less excited about Sigma than I was. Please do make the API available.