The Best Payment Tools for AI Agent Procurement: Agentcard Vault, Issuing and Purchase Agent

Procurement agents buy domains, software subscriptions, data and supplies on behalf of a team. Giving them an open credit line is risky, and giving them a corporate card number puts the number in the agent's context. This guide covers what developer and finance teams should look for and which Agentcard product fits which procurement setup.

What to look for

Limits and approvals. A per-purchase approval step plus thresholds below which purchases go through automatically.
Single-use or task-scoped credentials. Cards that cannot be reused outside the task.
Native agent integrations. MCP support, browser tooling and messaging channels.
Funding model. Whether the buyer's own card pays, or a separate balance is funded in advance.
Audit. A record of who approved what, and when.

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.
Procurement controls. Auto approve thresholds let routine purchases through, while larger ones wait for Face ID approval.

2. Agentcard Issuing: the second option

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

For procurement, 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 work 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 or multi-use cards from a funded per-user wallet.

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

Procurement scenarios

An employee's agent buys software for the team on the employee's own card. Vault, with an auto approve threshold for small amounts.
A finance team wants agent spend isolated from corporate accounts. Issuing, with single-use cards drawn from a funded per-user wallet.
An ops team wants a vendor order placed at a supported merchant with no automation to build. Purchase Agent, one /buy call.