Building an AI voice agent for a spa client that uses Mangomint as their booking platform. Mangomint doesn’t have an inbound API, only outbound webhooks, so I can’t programmatically create appointments or push any data into it.
Here’s the challenge: the client requires card on file for no-show protection. For returning clients this is fine since their card is already saved in Mangomint. But for new clients, I need a way to securely capture and store card details collected by the voice agent during the call so a human can later manually enter them into Mangomint.
I have PII redaction enabled in Retell and execution logging disabled in n8n. But the core question is:
Where do you safely store a full credit card number that a voice agent collects over the phone, so a human at the business can retrieve it and manually enter it into the booking platform?
The human needs access to the full card number, so tokenization (Stripe, etc.) doesn’t work since you can never retrieve the original number back.
GHL custom fields are out too. GHL explicitly says they’re not PCI-DSS compliant and shouldn’t be used for card data. Plaintext in a database or spreadsheet is obviously a no go.
Has anyone solved this? Looking for a PCI-compliant way to temporarily hold full card details that a human can securely access and then delete after entry.
