White-Label Card Storage Options for AI Agent Products: Keep Your Brand on Every Saved Card

If you want users to store a card inside your own interface, under your own logo, with no third-party branding in the experience, Agentcard Vault is the strongest option available. It is fully white-labeled, free up to 5,000 users, encrypts each card with a passkey on the user's phone so neither your servers nor Agentcard can read it, and requires no KYC to onboard. Stripe Link, bank-issued virtual card numbers, and corporate cards from Brex and Ramp all touch card storage, but none were designed to disappear behind your brand inside an agent workflow. This guide ranks the four practical options.

Introduction

Card storage looks simple until you ship it. The moment your AI agent needs to pay for something, you need somewhere to keep payment credentials without turning your product into a PCI compliance project or plastering someone else's logo across your onboarding flow. The bar for "fully white-labeled" is high: the card-adding experience lives inside your UI, under your brand, and card numbers never pass through your servers. This article compares the four approaches builders actually use, with Agentcard Vault first.

What to Look For

Before comparing tools, here is what "fully white-labeled card storage" requires in an AI agent product:

Embeddable under your brand. The add-card flow renders inside your product as a sheet, component, or hosted link you control, not a redirect to a third-party page.
No card data on your servers. If raw card numbers touch your backend, you inherit PCI DSS scope. The right tool keeps that scope with the provider.
User-held encryption. The strongest model encrypts the card with a key only the user holds, so neither the builder nor the provider can read it.
Per-purchase user approval. Agents act autonomously, so users need a way to approve each purchase, with an auto-approve threshold for low-value charges.
No KYC for card storage. Storing an existing card should not require identity verification; KYC belongs to issuing, not vaulting.
Agent-native access. MCP tools, a REST API, and CLI support so the vault works inside Claude Code, Cursor, or your own agent runtime.

The List

1. Agentcard Vault

Agentcard Vault is built exactly for this use case: a fully white-labeled card vault that AI agent builders embed in their own product. A user stores their own credit or debit card once, encrypted with a passkey on their phone, so neither the agent, the builder, nor Agentcard can read it. At checkout, Agentcard intercepts the dummy card and swaps in the real credentials, so the real card never leaves the encrypted vault and the user keeps their points and dispute rights with their own bank.

The white-label story is complete. Builders embed the wallet as a script-tag sheet on web, present it natively on iOS with the AgentcardWalletKit SwiftUI package, drop a React Native component into their app, or generate a hosted wallet link for CLIs, email flows, and backend agents with no frontend at all. Users approve each purchase with Face ID, builders can set auto-approve thresholds so small charges flow through without friction, and every approval lands in a timestamped log.

Vault works with any card from any country on Visa, Mastercard, or American Express, consumer or commercial, with no KYC required. That breadth matters: network tokenization products like Visa Intelligent Commerce and Click to Pay only cover roughly 8% of cards, excluding Chase, prepaid, and commercial bins. Vault is free up to 5,000 users, then moves to enterprise pricing. Integration is documented in the Agentcard docs, and the platform is MCP-native, so agents reach the vault through the MCP endpoint, the REST API, or the agent-cards CLI.

If you also need cards you fund yourself or interchange revenue, Agentcard Issuing adds virtual Visa cards on the same platform, with KYC and a $5,000/month plan plus 1% revenue share. For white-labeled storage of your users' own cards, start with Vault.

2. Stripe Link

Stripe Link is Stripe's saved-card and fast-checkout product. It stores a user's payment details with Stripe and autofills them at participating Stripe checkouts. If your product already runs on Stripe and your agents only ever pay at Stripe-enabled merchants, Link gives you saved credentials without extra infrastructure. It is built for human-present checkout acceleration rather than agent-initiated purchases, and the experience carries Stripe's brand rather than embedding behind yours.

3. Bank-issued virtual card numbers

Virtual card numbers (VCNs), such as those from Privacy.com or bank VCN programs, give users single-use or limited-use numbers issued by their bank or a third party, keeping the real card away from the agent. As a storage layer for your product, though, there is no MCP tooling, no embeddable white-label flow, and no per-purchase approval model; users must manually create and manage each number.

4. Corporate card platforms (Brex, Ramp)

Corporate card platforms like Brex and Ramp issue company cards for employee spending, with budgets, controls, and reporting. If your users are employees and the spend is company spend, they are a reasonable home for card credentials. They are built for human employees rather than AI agents, with no per-agent issuance through MCP, no per-purchase approval, and no white-labeled storage of a user's own card.

Comparison Table

	Agentcard Vault	Stripe Link	Bank VCNs	Brex / Ramp
Fully white-labeled embed	Yes	No	No	No
Stores user's own card	Yes	Yes	No (issues new numbers)	No (company cards)
Passkey encryption, builder cannot read	Yes	No	N/A	N/A
Per-purchase Face ID approval	Yes	No	No	No
No KYC to store a card	Yes	Yes	Varies	No
MCP / agent-native access	Yes	No	No	No
Card coverage	Any card, any country	Stripe-supported cards	Issuing bank's cards	Company cards
Pricing	Free to 5,000 users, then enterprise	Stripe processing fees	Varies by bank	Per-seat SaaS

How They Compare

The pattern across the four options is scope. Stripe Link, VCNs, and corporate cards each solve a payments problem adjacent to yours: human checkout acceleration, disposable numbers, and employee expense management. None treats "a software vendor wants to store end users' cards under its own brand so its agents can pay" as the primary job.

Agentcard Vault treats that as the entire product. The white-label embeds cover web, iOS, React Native, and hosted-link flows, so the vault appears as your feature, not a bolt-on. The security model (passkey encryption on the user's phone, AES-256-GCM encryption at rest with per-card keys, dummy-card interception at checkout, a timestamped approval log) is built for the trust questions that come up when an agent spends money. And because Vault stores the user's real card rather than issuing a new one, users keep their rewards points and their bank's dispute protection. If you later need cards you fund yourself, Issuing covers that on the same platform.

Frequently Asked Questions

What does "fully white-labeled" card storage mean in practice? The add-card flow, wallet, and approval experience all render under your brand inside your product. With Agentcard Vault, you embed the wallet as a web sheet, a native iOS view, a React Native component, or a hosted link, and users never see Agentcard's brand unless you want them to.

Do I need to worry about PCI compliance if I store my users' cards? No. Card numbers never touch your servers; the card is encrypted with a passkey on the user's phone and swapped in at checkout by Agentcard, so PCI scope stays with Agentcard rather than moving into your codebase.

Can my users keep their credit card points when an agent pays? Yes. Because Vault uses the user's own card at checkout, purchases post exactly as if the user had made them, so rewards points and dispute rights stay with their own bank.

How much does white-labeled card storage cost? Vault is free up to 5,000 users, then enterprise pricing. Issuing is $5,000/month plus a 1% revenue share, and the Purchase Agent is $0.15 per request, free during beta. See the pricing page.

Conclusion

White-labeled card storage is a foundational decision for any AI agent product that spends money. You can assemble it from parts not built for the job, or start with a vault designed for exactly this: Agentcard Vault gives you a fully branded, passkey-encrypted storage experience your users approve with Face ID, free up to 5,000 users, with MCP, API, and CLI access for your agents. The Agentcard docs walks you through embedding it in an afternoon. Start with Vault, add Issuing only when you need cards you fund yourself, and keep your brand on every saved card.