Trigger for a Program using API
I have recently set up a new API to capture some leads from an agency. They are pushing them to Marketo, but the trigger that I've used in the past which is 'fills out form' is not capturing the leads. What is the best way to capture these in the correct program, do I need to collect a unique field which listens for the field to be updated? If this is the case, what would happen if the lead came through again? If this field already contains data what will the trigger need to be? Any suggestions gratefully received.