Sierra and Stripe Let Agents Take Card Payments Inside Phone Calls. The Agent Never Sees the Card.

A patient calls a health system, confused by a medical bill. They speak with an AI agent named Kora. Instead of being transferred to a human or navigating a phone tree, the patient resolves the balance in the same conversation. At the moment of payment, the agent shifts into a secure mode. The patient enters card details on the phone keypad. The digits route to Stripe, the payment clears, and the agent comes back on the line to confirm it and send a receipt. The agent never sees the card number, only payment status and the last four digits. The workflow went live October 20, per a Sierra blog post describing its Stripe integration, and it is the clearest sign yet that the money layer of agentic commerce is arriving…

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