Three competing open standards — from Stripe, Coinbase, and Google — now contend to govern how AI agents pay for resources across the internet. PaymentsProtocols.com is the only domain positioned above them all.
Not tied to MPP. Not tied to x402. Not tied to AP2. The neutral namespace that covers every standard, every entrant, and every protocol yet to be written. One domain to own the entire category — regardless of who wins.
An objective, neutral registry of every active machine payment standard.
Co-authored by Stripe and Tempo, MPP enables agents to pay programmatically via any HTTP-addressable endpoint. Supports stablecoins, cards, and BNPL via Shared Payment Tokens. Payments settle in existing Stripe balances with full fraud, tax, and payout infrastructure intact.
| Authors | Stripe · Tempo |
| Methods | Stablecoin · Card · BNPL |
| Settlement | Fiat + Crypto |
| Integration | PaymentIntents API |
| Token Type | Shared Payment Token |
Coinbase's activation of the long-dormant HTTP 402 "Payment Required" status code. Any HTTP endpoint can gate access behind a micropayment — turning every API into a paygate. Stablecoin-native, permissionless, trustless. No intermediary required between sender and recipient agent.
| Author | Coinbase |
| Methods | Stablecoin-native |
| Settlement | On-chain |
| Model | Permissionless |
| Standard | HTTP 402 Revival |
Google's entrant into the machine payments stack — announced September 2025. Supports both card and stablecoin payment flows, positioning Google's existing payments infrastructure as the foundational layer for agent commerce across its cloud and developer ecosystems.
| Author | |
| Methods | Card · Stablecoin |
| Settlement | Fiat + Crypto |
| Announced | September 2025 |
| Network | Google Pay stack |
No single standard has won. MPP, x402, and AP2 are simultaneous bets on different architectures. A domain named after none of them — but encompassing all of them — captures the category regardless of outcome. The war's winner inherits the name's authority.
Stripe's announcement is not speculative: browsers are already paying per session, agents are ordering physical mail, sandwiches, and cloud infrastructure autonomously. Coinbase and Google have live implementations. The namespace is crystallizing before a canonical home exists.
The most valuable fintech domains weren't company names — they were category nouns. PaymentsProtocols.com occupies that precise intersection at the precise inflection point when the category is being named in real time by Stripe, Google, and Coinbase simultaneously.
Domain valuation is partly a function of timing. Pre-adoption pricing is available today. As machine payment transaction volume scales — and Stripe has publicly forecast that agent payments will overtake human payments — this window for early acquisition pricing will not persist.
PaymentsProtocols.com is the only available .com that could credibly serve as the home for any and all of the competing standards. The plural construction is deliberate: it doesn't pick a winner. It owns the namespace that all winners must reference.
Stripe (latest valuation: $91B), Coinbase (public, $50B+ market cap), Google, Visa, and Mastercard are all active participants in this space. Each has independent strategic motivation to own the generic namespace. That's a competitive buyer dynamic — not a single counterparty.
"Agent payments will soon overtake human payments on the internet."
— Stripe, announcing the Machine Payments Protocol, 2025Co-author of MPP and architect of the Agentic Commerce Suite. Owning the generic category namespace anchors the standard's authority and preempts competitors from claiming the canonical domain for machine payment standards.
Paradigm-backed co-author of MPP. A direct stake in the protocol succeeding as the dominant standard. The neutral registry is a natural acquisition to cement the institutional framing of machine payments around MPP's architecture.
Authors of x402. Acquiring the umbrella domain is a defensive positioning play — preempt Stripe or Google from owning the generic namespace and establishing MPP or AP2 as the category default in the public mind.
Active design partners across multiple protocols simultaneously. As the incumbent card networks building extensions for agent payments, the neutral registry is a natural institutional acquisition ahead of mass agent commerce adoption.
A venture-backed startup building middleware that sits above MPP, x402, and AP2 simultaneously — routing agent payment transactions across all standards. The domain name is the brand. The namespace is the product.
The publication-of-record or governance consortium for machine payment standards — analogous to W3C for web standards or BIS for global payments. A canonical address that draws developers, investors, and regulators to a single neutral home.
Developer documentation hub covering all active machine payment standards — the MDN of agentic payments.
Standards body homepage for a consortium formalizing the machine payments layer, analogous to W3C or IETF.
Brand anchor for the protocol that wins the standard war — renaming the category around the domain rather than the protocol.
Newsletter, conference, and index tracking the machine commerce ecosystem as agent transaction volume scales.
Middleware platform brand for cross-protocol agent payment routing sitting above MPP, x402, and AP2 simultaneously.
FinTech infrastructure company's forward-deployed category brand — establishing namespace ownership before direct competitors.
Domain value is not static. It tracks the category it represents. Machine payment standards are being adopted at institutional velocity — Stripe, Google, Coinbase, and Visa are shipping simultaneously. Every milestone in the agentic economy increases the value of owning its canonical namespace.
PaymentsProtocols.com is a premium .com domain available for acquisition. It is the neutral, protocol-agnostic namespace covering the emerging category of machine payment standards — including MPP (Stripe/Tempo), x402 (Coinbase), AP2 (Google), and ACP (Stripe). The domain is offered for sale as a speculative infrastructure asset with strong appreciation potential tied to the growth of the agentic economy.
Machine payment protocols are open standards enabling AI agents and automated systems to pay for resources programmatically — without human involvement. Stripe and Tempo's MPP, Coinbase's x402, and Google's AP2 each provide a different technical architecture for agent-to-agent and agent-to-service transactions. These standards support microtransactions, stablecoins, card payments, recurring billing, and BNPL between autonomous agents at scale.
PaymentsProtocols.com uses a generic, plural construction that is not tied to any single standard. MPP, x402, and AP2 are competing architectures — no winner has emerged. A domain that owns the category name rather than a specific protocol retains value regardless of which standard achieves dominance. The company, body, or platform that acquires this domain is not betting on a protocol. They are buying the namespace above the protocol war.
Domain value tracks the category it represents. Machine payment standards are being adopted at institutional velocity — Stripe, Google, Coinbase, and Visa are all shipping simultaneously. As adoption metrics confirm category scale, the strategic value of owning this namespace increases materially. Current pricing reflects the early phase of market development. As the agentic economy grows, pricing will be revised upward. This window — from $8,800 — will not persist indefinitely.
MPP (Machine Payments Protocol) is co-authored by Stripe and Tempo, supports stablecoins, cards, and BNPL via Shared Payment Tokens, and integrates directly with Stripe's existing PaymentIntents API. x402 is Coinbase's implementation of the HTTP 402 "Payment Required" status code — permissionless, stablecoin-native, and trustless. AP2 (Agentic Payments Protocol) is Google's standard supporting both card and stablecoin flows, leveraging Google's existing payments network. All three are active and in contention to become the dominant machine payment standard.
Three verified checkout platforms are available: Spaceship ($8,800), Atom.com ($9,500), and Afternic/GoDaddy ($11,500). All transactions are secured via escrow — funds are held until domain transfer is confirmed complete. Click any checkout button on this page to proceed directly. No negotiation required at listed prices. For structured or institutional acquisition arrangements, all three platforms support custom transaction structures.
Structured payment arrangements, installment plans, and cash-plus-equity deals may be considered for qualified institutional buyers. Atom.com supports installment options natively. For bespoke arrangements — including licensing models, equity splits, or staged payment structures — the domain holder can be contacted via the acquisition platforms listed on this page.
.com remains the authoritative TLD for institutional credibility, developer trust, and search engine authority. Branded alternatives like mpp.io or x402.org are tied to a single protocol and lose value if that protocol loses the standards war. PaymentsProtocols.com is a generic category noun on the most trusted TLD — it benefits from all protocol activity simultaneously and depreciates only if the entire category of machine payments fails to materialize, which Stripe, Google, and Coinbase have each independently ruled out.