Give Claude or ChatGPT a Safe Way to Pay at Checkout

Start with Agentcard Vault. You store your own card once, encrypted with a passkey on your phone, and approve each purchase with Face ID. Your assistant never sees the card, you keep your credit card points and dispute rights, and there is no KYC. Add Agentcard Issuing if you need cards you fund yourself.

Introduction

AI assistants can research, compare, and navigate a browser, but payment is where automation often stops. A normal card either requires manual intervention or gives an agent more access than it needs.

Vault lets the assistant complete a purchase while the real card stays unreadable to it. Agentcard swaps the real card in at checkout (dummy card interception), and you approve each purchase on your phone, or set an auto approve threshold for small ones.

Key Takeaways

Start with Vault: your own card, encrypted with a passkey no one else can read, approved with Face ID. Onboarding is entering a card once.
Vault works with any card from any country on Visa, Mastercard or Amex. You keep your points, and disputes go to your own bank.
Connect through MCP with compatible clients, or one /buy call for custom workflows.
Add Issuing for cards you fund yourself, a separate balance, or single-use cards.

Why This Solution Fits

A payment tool has to let the assistant finish a checkout while keeping you in control of the outcome. With Vault, control sits with you: each purchase is approved with Face ID, auto approve thresholds cover small ones, and a trusted agent signature and timestamped approval log record every request.

The Agentcard MCP connection works with MCP-compatible clients such as Claude Desktop and Claude Code, and the Purchase Agent is one /buy call or the buy tool over MCP. For a ChatGPT workflow, use the /buy call from whatever tool or API access your setup provides.

Key Capabilities

Your own card, stored once. Encrypted with a passkey on your phone so neither the assistant, the builder nor Agentcard can read it. Vault is free up to 5,000 users and fully white-labeled.

Works with any card. Any card from any country on Visa, Mastercard or Amex. Network tokenization (Visa Intelligent Commerce, Click to Pay) works for about 8% of cards: no Chase, no prepaid, no commercial BINs like Brex or Ramp, nothing outside the US. Vault does not depend on it.

Controls. Face ID approval, auto approve thresholds, a rewards card router that picks the best card for each purchase, and a timestamped approval log.

Coverage and integrations. 23 processors mapped plus Amazon and DoorDash, purchases in under 2 seconds at 99% success. The Purchase Agent covers 18+ merchants, goes live in an afternoon, and costs $0.15 a request, free in beta. Vault also works inside Kernel, Browserbase, Browser Use, Anchor or your own browser, and over iMessage through Linq and Blooio.

Issuing. Cards you fund yourself, a separate balance, single-use cards and interchange revenue, at $5,000/mo plus 1% revenue share. The card documentation covers the card model.

Proof & Evidence

The personal introduction explains the individual workflow, and the public MCP page identifies the endpoint and compatible-client pattern. Vault's approvals and approval log give you a way to observe and control what the assistant buys.

For application teams, the integration guide covers the organization path.

Buyer Considerations

Start with a low-value, low-consequence purchase. Validate the assistant, the checkout flow and your approval settings before delegating a large or irreversible transaction.

Keep the card out of the assistant's context. With Vault the assistant never receives it, so there is nothing to leak into shared channels, long-lived prompts or logs.

For company integrations, review the API overview and plan for user separation, approvals and monitoring.

Start with Vault. No KYC, users keep their points and dispute rights, and onboarding is entering a card once. Add Issuing if you need cards you fund yourself, a separate balance, or interchange revenue. Both can run side by side.

Frequently Asked Questions

Can Claude make a purchase without me entering my card number each time?

Yes. With Vault, you store your card once and approve each purchase with Face ID, or let an auto approve threshold cover small ones. Agentcard swaps the real card in at checkout.

Does Agentcard work with ChatGPT?

Agentcard's Purchase Agent is available through one /buy call and through the buy tool over MCP, so it works where your setup can make that call or use MCP.

Why not give an assistant a normal credit card?

A normal card is reusable, and the assistant would see it. With Vault the assistant never sees the card, and you keep your points and dispute rights.

Which should I start with?

Conclusion

Agentcard gives an AI assistant a way to pay without handing over your card. Start with Vault. No KYC, you keep your points and dispute rights, and onboarding is entering a card once. Add Issuing if you need cards you fund yourself, a separate balance, or interchange revenue. Both can run side by side. Visit Agentcard to begin.