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Ask HN: How does Upromise track my credit card use?

1 pointsby jasonabelliover 13 years ago
I am trying to get a start up off the ground. I need to track my members credit card use similarly to Upromise to make business plan work. I have tried to contact Upromise, Visa, MasterCard, and a new start up Linkables that tracks CCs but everyone seems pretty closed lipped about it. Does anyone have any ideas how this is done. If you are not familiar with Upromise here is their “how it works” page. http://www.upromise.com/welcome/how-it-works

2 comments

jeffmouldover 13 years ago
Not 100% positive, but I would think a service like Yodlee can provide you with help. It is the same service that mint.com (although I don't believe they use it anymore) and others use to aggregate your financial data into their platforms.
mthomasover 13 years ago
Each retailer that "supports" Upromise sends them a sha256 hash of your creditcard along with the amount for each transaction.
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