Does anyone know if it's possible to pass a parameter with a Smartlist API call? i.e. Not rely on the Smartlist criteria to retrieve bespoke data.
I don't quite understand your question. Are you trying to pass QPs to the SL API endpoints? There are limited operations that you could do using the smart list API endpoints specifically. What's the exact business case for this? If you wish to query/get Marketo people, you should technically be using the leads/bulk leads extract endpoint. There are a variety of filters that you could pass with these endpoints to get the right people from your database.
@John_Stothard , what is the use case? It's not clear what you want to achieve? I THINK you want to get lead data based on filter criteria without using a smartlist, but I'm not certain