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Re:The $10 Payment That Cost Me $43.95 – The Madness of SaaS... by madeofpalk on Monday September 15, 2025 @09:03AM (#45249182)
> an API connection between bank and subscription?

This already exists. Mastercard (and Visa?) has an API that lets banks notify subscriptions when your card changes to update the card number https://developer.mastercard.com/product/automatic-billing-u...

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