OneCheckout vs. Rye: Not Your Card, Not Your Purchase

TL;DR: Rye is a personal shopper who pays with their own card and invoices you. OneCheckout puts your card in your agent's hand. Rye built genuinely impressive infrastructure for platforms that need to complete purchases at scale, funded through tokenized proxy cards with Rye's machinery standing between the buyer and the merchant. OneCheckout is built so the buyer and the merchant meet directly: your agent, your environment, your card, your rewards. If you're a platform that needs bulk checkout today, Rye is a serious option. If you're an agent owner, a developer, or a platform that wants its users to actually be the buyer, that's us.

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We agree on the problem

Rye deserves real credit, and not the polite kind. They rejected the partner-network shortcut early and insisted checkout should work on any merchant with a product URL, which is the same conviction OneCheckout is built on. Their Product Data API is genuinely great: pass any product URL, get back live structured data on price, availability and variants, with reliability numbers they publish and defend. Their engineering writing is unusually honest for the category. If the whole market held itself to Rye's standard on universality, agentic commerce would be further along.

So the disagreement isn't about reach. Both products aim at the entire internet. The disagreement is about the money path: when your agent buys something, whose card should the merchant see, and who should be standing in the middle?

Two architectures

Rye is a middleman by design. Their contract is clean: product URL, buyer identity and a third-party tokenized payment method in, confirmed order out. The purchase is funded through a proxy instrument in the middle rather than the buyer's own card at the merchant, and Rye's whitepaper notes the system is designed to interoperate with issuer-backed proxy-card protocols. Their newest rail goes further from the buyer's wallet, settling checkout fees in USDC over x402 from an agent-held crypto wallet. In every variant, the merchant transacts with the machinery, and the actual human's card stays outside the transaction.

OneCheckout is a direct line. Your agent runs in your environment, on your machine, logged into your accounts. When it buys, it pays with your own credit card through an eight-method cascade that prefers native agentic tokens (Mastercard Agent Pay, Visa Intelligent Commerce, PayPal Agent Ready) and falls back only as far as it must. The merchant sees you. Your statement shows the merchant. Your card's rewards, purchase protections and dispute rights attach to the purchase, because it's genuinely your purchase.

Not your card, not your purchase

The proxy-card model has real costs that don't show up in a latency benchmark.

You forfeit the card relationship. No points, no cashback, no card-level purchase protection, no extended warranty coverage, because your card was never used. On serious spend, that's not a rounding error. It's a percentage of everything your agent ever buys, surrendered to an architecture decision.

The paper trail gets weird. When a proxy instrument in the middle funds the purchase, the merchant-of-record chain, the chargeback path and your statement all route through the middleman. Ask anyone who's tried to dispute a charge that reads as a processor instead of a store. Sometimes this structure is the only viable route, and we'll say so plainly below. But it should be a last resort, and in the proxy-card model it's the whole product.

Guest checkout means shopping as a stranger. Rye's own materials scope universal coverage to sites that allow guest checkout. Your agent can't use your Amazon Prime shipping, your member pricing, your loyalty accounts or your saved subscriptions, because it isn't you. A OneCheckout agent operates inside your environment with your logins, so it shops with every advantage you've earned.

Where we're pointed, and why it's consistent

Rye argues that merchant-adoption protocols have stalled, and on the catalog side they have a point: ACP and UCP ask merchants to build and maintain structured feeds, and uptake has been slow. But that argument doesn't touch the rails we're building on. Mastercard Agent Pay and Visa Intelligent Commerce are network-side payment credentials. They work at the checkout forms merchants already have, no catalog integration required, and they carry the buyer's own card identity through the transaction. The card networks are rolling them out on the largest payment install base on earth.

Our position, stated once and applied everywhere: agentic tokens where viable, universal fallbacks where not, and virtual cards as the bottom rung rather than the architecture. We keep a card-on-card fallback wrapped inside a compliant issuer boundary, because refusing to complete a purchase is worse than completing it imperfectly. The difference between us and Rye isn't the toolbox. It's the ordering. Their model leads with the instrument we treat as the emergency exit, and it has no native path to the token rails at all. We deploy universal coverage today and we're built for the future the networks are shipping, and there's nothing hypocritical about doing both. That's just what a cascade is.

What only OneCheckout does

Your own card, full stop. Transacting directly on the buyer's own credit card, with the buyer's own rewards, is a OneCheckout capability that no proxy-card architecture can offer. It falls out of running in your environment instead of a server farm.

More than shopping. Rye buys you products. OneCheckout builds you a company. The same MCP that buys a flight can incorporate your business, register a domain, provision phone numbers, mint API keys and stand up your SaaS stack, twelve capability areas in all. Developers and agent owners aren't an afterthought on the way to platform revenue. We treat them as first-class citizens, because agents using their own cards in their own environments, and developers building their own agents with their own code, are among the most important users in agentic commerce. Buying things is table stakes. We make the people building the future more powerful.

A consumer product you can install today. The OneCheckout MCP is free and works with Claude Code, Codex and any MCP-capable runtime. Rye's closest consumer touchpoint is an OpenClaw skill limited to Amazon and Shopify, with the real product being a platform API.

For platforms: what our API brings

Rye ships a platform API today, and ours is still on the way, so hold us to future tense here. When it launches:

Agentic tokens out of the box. If you never want to deal with merchant-of-record shenanigans, you'll be able to run tokens-only and skip the proxy-card layer entirely.

Your users pay as themselves. End users transact on their own cards inside your product, keeping their rewards and their dispute rights, instead of being billed through your middleman.

A real vault and merchant-first connections. We operate our own vault, and through OneText we've built merchant-side integrations that connect a user's card directly to the merchant with as little friction as we know how to remove.

And one more thing we're not announcing yet. We're working on a universal solution we believe is much better than card-on-card. Watch this space.

What Rye gets right

Product data. Their Product Data API is the best structured-commerce-data product we're aware of, and OneCheckout doesn't offer an equivalent. If your platform needs live catalog data at scale, use it. This card would be weaker for pretending otherwise.

Speed and scale in production. Sub-five-second checkout on Amazon and Shopify through direct integrations, published SLO targets elsewhere, and reported coverage of 15,000+ merchants at 99.9% order reliability. Those are their numbers, but they publish them and invite verification, which most of the category won't do.

Shipping. Their platform API exists today with real customers. Ours is coming. If you need bulk universal checkout in production this quarter and the proxy-card tradeoffs are acceptable for your use case, Rye is the credible choice, and for some platform cases the proxy model is currently the only viable route. We'd rather tell you that than have you learn it from them.

One caveat their own writing supplies: Rye documents a manual fallback as the last resort when automation fails, meaning a human may complete the edge-case order. OneCheckout's checkout path is your agent plus deterministic code filling the payment form, with no humans in the loop.

Head to head

Which one is for you

Pick Rye if you're a platform that needs high-volume universal checkout and live product data in production right now, your users don't expect their own cards and rewards to travel with the purchase, and the proxy-card structure fits your compliance posture. That's a real customer with a real need, and today Rye serves it well.

Pick OneCheckout if you own an agent or build agents and want purchases that are actually yours, on your card, with your accounts, at your member prices. Or if you're a platform that wants your users to be the buyer of record, on token rails, without a middleman between them and the merchant.

Rye built the best version of the middleman. We're building the version where the middleman disappears.

Your agent. Your card. Your purchase.

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