Best Platforms for AI Agent Card Payments on Traditional Fiat Rails

Agents that pay on traditional card rails avoid the crypto and stablecoin detour: the merchant receives a normal card payment and the user has a normal card statement. The question is which card sits behind the payment. This guide compares the Agentcard options and the common alternatives.

What to look for

• Real card payments. The merchant sees an ordinary card transaction.
• Whose card pays. The user's own card, or a card funded separately.
• Card coverage. Any Visa, Mastercard or Amex card, or a narrower set.
• Dispute path. Disputes go to the user's bank, or to another party.

1. Agentcard Vault: the first option to try

A user stores their own card once in Vault. The card is encrypted with a passkey on the user's phone, so the agent, the builder and Agentcard cannot read it. Each purchase is approved with Face ID, or automatically inside an auto approve threshold the user sets.

At checkout, Agentcard intercepts the payment with a dummy card and swaps the real card in. The merchant is paid with the user's own card, so the user keeps their points and disputes go to their own bank. A rewards card router can pick the best card for each purchase.

• Any card, any country. Vault takes any card from any country on Visa, Mastercard or Amex.
• No wallet, no prefunding, no KYC. Nothing to load and nothing to verify before a user can start.
• Audit trail. A trusted agent signature and a timestamped approval log record every purchase.
• Coverage. 23 processors are mapped, plus Amazon and DoorDash. Purchases complete in under 2 seconds at a 99% success rate.
• Price. Free up to 5,000 users, then enterprise pricing. Fully white-labeled.
• Integrations. Kernel, Browserbase, Browser Use, Anchor, bring your own browser, and iMessage via Linq and Blooio.
• Fiat rails only. The merchant receives a card payment from the user's own card; no crypto is involved.

2. Agentcard Issuing: the second option

Issuing is for teams that need cards they fund themselves. It offers single-use or multi-use virtual Visa cards the builder funds, and it funds a per-user wallet, so each user has a separate balance the card draws from. Issuing requires KYC before the first card, the per-user wallet is funded in USDC on Base, and it earns interchange revenue. Pricing is $5,000/mo plus 1% revenue share.

Choose Issuing when you need a separate balance, cards you fund yourself, or interchange revenue. Because the wallet is funded in advance, it suits cases where the spend should be walled off from the user's own card. Vault does not need a wallet at all, which is why it is the first option to try.

3. Agentcard Purchase Agent: a done-for-you checkout

The Purchase Agent runs the checkout for you. Send one /buy call, or use the buy tool over MCP. It covers 18+ merchants and can be live in an afternoon. Pricing is $0.15 per request, and it is free in beta.

Use it when you do not want to build or maintain checkout automation yourself.

How the alternatives compare

Stripe Link. Compare it on three points: whether the user's own card stays in the flow, whether each purchase has an approval log, and whether it works outside its own merchant network.

Virtual card numbers. A virtual card number is a separate number that stands in for a card. Network tokenization schemes such as Visa Intelligent Commerce and Click to Pay worked for about 8% of cards: no Chase, no prepaid, no commercial BINs like Brex or Ramp, and nothing outside the US. Vault works with any card, because it swaps the real card in at checkout rather than relying on a token from the issuer.

Corporate cards. Corporate cards are built for employees and monthly budgets, and commercial BINs like Brex or Ramp do not work with network tokenization. Vault accepts them as a user's card. If you want a card that is separate from the corporate account, Issuing provides single-use cards from a funded per-user wallet.

Crossmint. Crossmint is complementary, not a competitor. It can sit alongside Agentcard in an agent stack.

Quick comparison

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.

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