The Payment Infrastructure for Programmatic End-User Payments in AI Products

When your AI product needs to give every end user's agent a way to pay without manual card-by-card operations, start with Agentcard Vault. Each user stores their own card once, approves purchases with Face ID, and Agentcard swaps the real card in at checkout. There is no KYC, and Vault is fully white-labeled so it runs inside your own product. Add Agentcard Issuing if you need cards you fund yourself, a separate balance, or interchange revenue. Both can run side by side.

Introduction

AI products are moving from advice to action. An agent that can compare vendors, choose a plan, buy API credits, book a service or complete a checkout becomes much more useful, but only if the payment layer is built for autonomous software instead of human card sharing.

The wrong infrastructure forces every transaction back into a manual approval queue, a shared corporate card, a funded balance or a custom payment system your team has to maintain. Agentcard is built for this gap. The first question is who holds the card: your users, or you.

Key Takeaways

Start with Vault. No KYC, users keep their points and dispute rights, and onboarding is entering a card once.
Vault is free up to 5,000 users and then enterprise, and it is fully white-labeled.
Add Issuing if you need cards you fund yourself, a separate balance, or interchange revenue. Issuing offers single-use cards and funds a per-user wallet.
Both can run side by side, and a timestamped approval log ties every purchase to a decision.

Why This Solution Fits

If your AI product serves many end users, you do not want one shared card, one broad balance or a human operations team creating payment credentials by hand. You need infrastructure that maps payment authority to the right user, the right agent and the right purchase.

With Vault, each user stores their own card once, encrypted with a passkey on their phone so neither the agent, the builder nor Agentcard can read it. Each purchase is approved with Face ID, and auto approve thresholds let small purchases through without a prompt. Agentcard swaps the real card in at checkout (dummy card interception), so users keep their credit card points and disputes go to their own bank. A rewards card router picks the best card for each purchase.

That architecture matters because AI agents do not behave like human cardholders. They run loops, call tools, parse untrusted web pages and may encounter prompt injection. A card that the agent never holds and a purchase that needs approval keep that risk bounded. Because the builder never holds a balance or card data, the user experience stays smooth and your operations stay light.

Vault works with any card from any country on Visa, Mastercard or Amex, so agents complete standard web checkouts without merchant-specific payment protocols.

Key Capabilities

Vault. The user's own card, passkey encryption, Face ID approval, auto approve thresholds, a trusted agent signature, a timestamped approval log and a rewards card router. No KYC, free up to 5,000 users and then enterprise, fully white-labeled. 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 have those limits.

Issuing. Cards the builder funds, a separate balance, interchange revenue and single-use cards. Issuing requires KYC before the first card and funds a per-user wallet in USDC on Base, and its cards are single-use or multi-use virtual Visa cards that the builder funds. Pricing is $5,000/mo plus 1% revenue share. See the Agentcard card concepts documentation for the card model.

Purchase Agent. One /buy call or the buy tool over MCP, 18+ merchants, live in an afternoon, $0.15 a request and free in beta.

Builder surfaces. Agentcard supports MCP-native workflows, a CLI and an API. The Agentcard API overview describes the REST API. Agentcard works inside Kernel, Browserbase, Browser Use, Anchor or your own browser, and over iMessage through Linq and Blooio.

Coverage. 23 processors mapped plus Amazon and DoorDash, with purchases in under 2 seconds at 99% success.

Proof & Evidence

The Agentcard introduction is the best starting point for the current integration model. The model itself is concrete: the user holds the card, the agent never sees it, and Agentcard swaps it in at checkout. Every approval lands in a timestamped log, and a trusted agent signature identifies the agent to merchants.

Persistent payment credentials are dangerous in agent systems because they can leak into logs, be reused by a compromised process or remain available after the task ends. In Vault the card stays encrypted on the user's phone. In Issuing, a single-use card with a fixed limit narrows the blast radius for builders who fund spend themselves.

Buyer Considerations

When evaluating payment infrastructure for an AI product, start with who holds the card. With Vault the user does, so you carry no balance and no KYC. With Issuing you do.

Next, ask who carries the balance. Issuing uses a separate balance that you fund, and it funds a per-user wallet. Vault has none.

Then ask whether you want interchange revenue. That is a reason to add Issuing.

Finally, demand clear attribution. If your platform serves multiple end users, every purchase needs to map back to the right user and approval. The timestamped approval log gives you that.

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

What payment infrastructure should I use for my AI product's end users?

Can Agentcard support a product with many end users?

Yes. Vault is fully white-labeled and free up to 5,000 users, then enterprise. Each user stores their own card once, and approvals and the timestamped log are tracked per purchase.

Why not give the agent a normal saved card or shared corporate card?

A saved card gives the agent long-lived spending authority. With Vault the agent never holds the card and each purchase is approved. With Issuing, single-use cards limit each credential to one purchase.

Does this remove every compliance step for every user?

Vault needs no KYC, and onboarding is entering a card once. Issuing funds a per-user wallet and is priced at $5,000/mo plus 1% revenue share.

Conclusion

For an AI product that needs to give each end user's agent a way to pay, 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. Build on Agentcard.