Google, Microsoft, Amazon Web Services, American Express, Mastercard, Visa, and major crypto firms including Circle, Base, Polygon Labs, and Solana Foundation have joined the newly launched x402 Foundation, established under the Linux Foundation to govern and standardize the x402 protocol for agentic AI payments on both crypto and fiat rails.
The protocol, named after the long-dormant HTTP 402 “Payment Required” status code, is designed as an open, neutral system for internet payments that enables AI agents to transact automatically without manual approval, addressing the anticipated surge in machine-to-machine commerce.
x402 Protocol Moves to Linux Foundation for Neutral Governance
The x402 Foundation was launched on April 2, 2026 by the open-source software development non-profit Linux Foundation with the assistance of Coinbase, which originally incubated the x402 protocol. The move gives the protocol a “neutral, non-profit home,” according to Coinbase, and is intended to attract broader support from technology firms and developers than if it were launched under a single company banner.
Linux Foundation CEO Jim Zemlin stated that the internet was built on open protocols, and the x402 Foundation will create an open, community-governed home to develop these capabilities in the open, ensuring evolution with transparency, interoperability, and broad participation across the ecosystem. The Linux Foundation is considered one of the largest and most influential open-source software non-profits in the world, serving as an umbrella organization for entities including the Hyperledger Foundation and the Cloud Native Computing Foundation.
Founding members of the x402 Foundation include Amazon Web Services, American Express, Ant International, Base, Circle, Cloudflare, Google, KakaoPay, Mastercard, Microsoft, Polygon Labs, Shopify, Solana Foundation, Stripe, Thirdweb, and Visa. Coinbase initially established the x402 Foundation with support from Cloudflare and Stripe, which will remain active in the expanded organization.
Protocol Enables AI Agents to Transact Automatically on Multiple Rails
The x402 protocol uses the HTTP 402 “Payment Required” status code—a blank space that the internet’s original architects planned to fill with a native payments system—combined with Ethereum Improvement Proposal 3009, a pre-signed authorization feature, to enable AI agents to transfer funds automatically without manual approval. The protocol supports not only crypto transactions via Base, Polygon, and Solana, but also legacy channels including credit cards, ACH, and bank rails.
Coinbase CEO Brian Armstrong stated that there will be more AI agents transacting online than humans very soon. Circle CEO Jeremy Allaire said in January 2026 that “literally billions of AI agents” will be transacting onchain in three to five years. Former Binance CEO Changpeng Zhao also stated in January that crypto is the “native currency for AI agents,” which will handle everything from buying tickets to paying bills without credit cards.
The x402 protocol is one among an emerging set of open source standards designed to facilitate the nascent agentic economy. In March 2026, Stripe and Tempo released the Machine Payments Protocol, while Visa rolled out a command-line payments tool for bots. Stripe Business Lead Kevin Miller stated that Stripe is building financial infrastructure for the agentic commerce era, and open protocols are an important part of creating a thriving ecosystem.
Transaction Activity Shows Early Adoption but Declined in 2026
Dune Analytics data shows that x402 transaction activity peaked in November 2025, with 13.7 million transactions observed during the week of November 4-10, followed by another 13.66 million transactions the following week. However, transaction activity has fallen sharply since then, with weekly transactions ranging between 29,000 and 1.1 million in 2026. Daily transaction volumes are typically measured in the tens of thousands.
The protocol has been gradually improved by Coinbase over the past year to become increasingly AI-friendly, including tools to give agents wallets and ensure technological neutrality. The x402 protocol won’t be owned by a single entity, with the Linux Foundation serving as the protocol’s neutral home.
Industry Sees Agentic AI Payments as Major Growth Area
The launch of the x402 Foundation comes amid a broad industry belief that AI agents could become the dominant users of blockchain payments in the coming years. Major technology and financial firms are positioning themselves to capture value from machine-to-machine commerce, where AI agents will autonomously purchase services, pay for data, and settle transactions without human intervention.
The x402 protocol’s open, vendor-neutral structure under Linux Foundation governance is designed to ensure interoperability across different payment systems and blockchain networks. The foundation’s founding members represent a cross-section of cloud providers, payment networks, crypto platforms, and e-commerce companies, reflecting the multi-rail future of agentic payments.
FAQ
What is the x402 protocol and what does it enable?
The x402 protocol is an open, neutral payments system named after the HTTP 402 “Payment Required” status code. It enables AI agents to transfer funds automatically without manual approval using both crypto rails (Base, Polygon, Solana) and legacy channels (credit cards, ACH, bank transfers), combining the HTTP status with Ethereum Improvement Proposal 3009 for pre-signed authorizations.
Which companies are founding members of the x402 Foundation?
Founding members include Google, Microsoft, Amazon Web Services, American Express, Mastercard, Visa, Cloudflare, Shopify, Stripe, Circle, Base, Polygon Labs, Solana Foundation, KakaoPay, Ant International, and Thirdweb. The foundation is hosted under the Linux Foundation, with Coinbase as the original incubator of the protocol.
Why is the x402 Foundation significant for the future of AI and payments?
Industry leaders predict that billions of AI agents will transact online within three to five years, handling everything from ticket purchases to bill payments. The x402 protocol provides a standardized, open framework for these machine-to-machine payments, potentially becoming the dominant payment rail for the agentic economy, similar to how HTTP became the foundational protocol for the web.
