Account aggregator with instant notifications?

I’ve got a credit card which I’m consider using with curve for instant notifications but actually I’m thinking it would far more useful to have an account aggregator that does instant notifications on spend across multiple cards or accounts. I looked at Emma but doesn’t look like they support this. I just wanted to check if anyone else had found or has knowledge of a business that could provide this service

You won’t find an aggregator with instant notifications. Account providers would need to push notifications / transactions to aggregators and this doesn’t happen.