Agentic payments14 Jul 20265 min read
x402 just grew up
Today the Linux Foundation launched the x402 Foundation — with Visa, Mastercard, Stripe, Google, AWS, Coinbase and 30+ others behind it. We've been building on x402 at Polygon since last year, and this is the milestone we've been waiting for.
A year ago, when we started going deep on x402 at Polygon, the most common reaction was "the what?" It was a clever, half-forgotten HTTP status code — 402, "Payment Required" — that a small group of us were convinced could become the way machines pay each other.
Today the Linux Foundation launched the x402 Foundation — with Visa, Mastercard, Stripe, American Express, Google, AWS, Cloudflare, Coinbase, Circle, Shopify, and around thirty more organizations as founding members. Polygon Labs is one of them.
Watching something you bet on early go from "the what?" to a Linux Foundation standard, backed by basically the entire payments industry, in about a year — that's a genuinely great feeling.
What actually happened today
Coinbase, which created x402, contributed the protocol to a new, vendor-neutral foundation under the Linux Foundation. Forty organizations signed on as founding members, spanning card networks, banks, cloud providers, and chains. The mission is simple to say and hard to build: make it as easy for AI agents, APIs, and apps to send and receive money as it is for them to exchange data — across everything from cards to stablecoins, with no single company owning the rails.
The names are the story. When Visa, Mastercard, Stripe, AWS, and Google all put their weight behind the same open payment standard, that standard stops being a bet and becomes infrastructure. As Linux Foundation CEO Jim Zemlin put it, it's "a vital milestone in establishing an open, community-governed standard for payments over HTTP." Hard to say it better.
We didn't show up today — we've been here a year
This is the part I'm proud of. Polygon didn't join x402 when it got easy; we were early. One of the first things we did last year was add Polygon chain support to x402, so agents could actually settle these payments on a chain that's fast and cheap enough to matter. Around that, we've been building the whole stack in the open:
— The facilitator (x402-rs) — the middleware that sits in the middle and facilitates the payment between the buyer and the seller. We built it in Rust.
— The Agent CLI — one install and an agent has a wallet, an identity, and the ability to pay in stablecoins.
— Agentic Services — the dashboard where services list themselves so paying agents can find them.
— PIP-82 — a proposal to fund the rail so it's cheap enough for anyone to run.
Being one of the early contributors, and now a founding member of the Foundation, is exactly where we wanted to be when we placed that bet.
Why a standard changes everything
Open standard plus neutral governance means no single company owns the pipes. An agent can pay any service — on any chain, or a card network — without wiring up a dozen proprietary SDKs. That interoperability is the thing that actually makes an agent economy work; without it you get a hundred walled gardens and agents that can't transact across them.
HTTPS did this for security. A shared foundation is doing it for payments — and once it's a standard, it's not going anywhere.
Where Polygon fits, and what's next
Here's why I'm bullish, and specifically why I think Polygon matters in this. Agents don't make one payment — they make thousands of tiny ones, constantly. That only works on a chain built for high throughput and near-zero fees, one that can settle every request the moment it happens. That's exactly what Polygon is, and it's why we want it to be the settlement layer of choice for agentic payments.
The standard is now in place. What comes next is making it effortless: any developer, anywhere, able to accept and make x402 payments on Polygon in a few lines — with the wallet, the facilitator, and the discovery layer all just working. We'll keep building that in the open, and keep contributing inside the Foundation now that there's a proper home for it.
The last year took x402 from a curiosity to a standard. I think the next one takes it from a standard to something a real chunk of the internet's transactions quietly run on. We've been early to a lot of this — and we're more all-in than ever.
Building an API, dataset, or MCP tool agents should pay for?
We're onboarding partners to Polygon's Agentic Services — the directory where paying agents find you. If you want your service registered, or you just want to talk x402, my inbox is open.