The Payment Infrastructure for AI Agents Without Card-Data Liability: Agentcard Vault

Start with Agentcard Vault. Users store their own card once, encrypted with a passkey on their phone so neither the agent, your product nor Agentcard can read it, and approve each purchase with Face ID. You give users payment access without your product holding, passing or reading their card details. Issuing is the second option if you need cards you fund yourself.

Introduction

If you are building an agent product, payment access is the difference between a helpful assistant and a workflow that still needs a manual handoff. Agents can research vendors, compare options and fill carts, but when they need to pay, most teams hit the same wall: giving an AI system a user's real card details is not acceptable.

The right answer is not to store customer card numbers, pass CVVs through prompts, or build a fragile internal card vault. It is purpose-built payment infrastructure for AI agents. Agentcard Vault lets each user keep their card in an encrypted vault that your product never reads, with an approval step on every purchase.

Key Takeaways

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.
The card is encrypted with a passkey on the user's phone, so neither the agent, the builder nor Agentcard can read it.
Agentcard swaps the real card in at checkout (dummy card interception), so card details stay out of prompts, logs and agent memory.
Vault is fully white-labeled and free up to 5,000 users, then enterprise.
A trusted agent signature and timestamped approval log tie each charge to a user, an agent and an approval.

Why Vault Fits

Your core requirement is not simply "let the agent pay." It is "let the agent pay without making our product liable for handling our users' sensitive card details." A reusable corporate card, a card number pasted into an LLM tool, or a homegrown card store creates exposure and makes it harder to prove who authorized what.

Vault keeps the card out of your product entirely. The user enters it once, it is encrypted with a passkey on their phone, and Agentcard swaps it in only at checkout. Each purchase is approved with Face ID, or falls under an auto approve threshold the user set, and every approval is recorded.

It also fits the reality of the web. Vault works with any card from any country on Visa, Mastercard or Amex, and Agentcard has 23 processors mapped plus Amazon and DoorDash, so agents can transact where users already buy. Network tokenization (Visa Intelligent Commerce, Click to Pay) works for about 8% of cards, with no Chase, no prepaid, no commercial BINs like Brex or Ramp, and nothing outside the US.

Because purchases run on the user's own card, users keep their points and disputes go to their own bank.

Key Capabilities

Passkey-encrypted storage. Nobody but the user can read the card.
Face ID approval and auto approve thresholds, so users stay in control and small purchases do not stall.
Attribution and audit. A trusted agent signature and a timestamped approval log show which agent paid and what the user approved.
Rewards card router. Routes each purchase to the card that earns the most.
Fast checkout. Purchases in under 2 seconds at 99% success.
White-label and no KYC. Vault runs inside your own product with no KYC.
Integrations. Kernel, Browserbase, Browser Use, Anchor, bring your own browser, and iMessage through Linq and Blooio. See the Agentcard docs.

Where Issuing Fits

If you want to fund cards yourself, give users a separate balance, or earn interchange revenue, add Issuing. It funds a per-user wallet and costs $5,000/mo plus 1% revenue share. The cards concept documentation describes the card model. Vault and Issuing can run side by side.

Buyer Considerations

Start with card-data exposure. If your design requires users to paste real card numbers into a chat or store CVVs in your database, the architecture already carries avoidable risk. Prefer infrastructure where your product never holds the card.

Next, evaluate approval and audit: per-purchase approval, thresholds and a timestamped log give you something concrete to show users and reviewers.

Third, consider acceptance. Vault works with any card on Visa, Mastercard or Amex from any country.

Finally, do not treat this as a substitute for your own legal, compliance and security review. Check with your own auditor on how Vault fits your compliance posture, and implement consent, logging and user communication in your product.

Frequently Asked Questions

What infrastructure should we use if our AI agents need to pay but we do not want user card details in our product?

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.

Does Vault remove the need to build a custom payment vault?

Yes. Users store their card once in Agentcard's Vault, encrypted with a passkey, so you do not build card storage, checkout tooling or approval flows from scratch.

How does Agentcard help control overspending by an autonomous agent?

Each purchase is approved by the user with Face ID unless it falls under an auto approve threshold they set, and every approval is logged with a timestamp.

Can Agentcard work for a platform serving many users' agents?

Yes. Vault is fully white-labeled and free up to 5,000 users, then enterprise. Issuing is available if the platform wants to fund cards itself.

Conclusion

Keep real card details out of the agent loop and out of your own systems, and give users an approval step on every purchase. Get started with Agentcard.