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Ripple and Circle back x402 Foundation as Linux-hosted protocol targets web-native payments

Ripple and Circle back x402 Foundation as Linux-hosted protocol targets web-native payments

Backers say the Linux-hosted x402 effort draws on early web lessons to keep AI-driven commerce open, using HTTP-based payments to support transactions between agents, machines and users.

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Fact Check
The claim is directly confirmed by two primary sources. Ripple's own official X account (@Ripple) states 'Ripple is proud to join the x402 Foundation as a Premier Member.' The Linux Foundation's official press release announcing the operational launch of the x402 Foundation explicitly lists Ripple among its premier members. The x402 protocol is described exactly as claimed: a Linux Foundation-hosted open protocol enabling AI agents, applications, and APIs to send and receive payments as easily as they exchange data. Both sources are dated 2026-07-14, matching the event.
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Summary

The Linux Foundation's x402 Foundation is being framed by members as an effort to avoid the closed ecosystems that shaped the early web, as the group pushes an open payment standard for AI-driven commerce. The x402 protocol, originally developed by Coinbase and now stewarded by the foundation, is designed to let AI agents, machines and users transact over HTTP without subscriptions or manual card entry, potentially supporting both larger purchases and micropayments. Denelle Dixon, CEO of Stellar Development Foundation, said open standards matter because AI agents could account for a large share of future internet commerce and help determine whether payments remain interoperable or become locked inside proprietary systems. The protocol takes its name from the long-unused '402 payment required' HTTP response code, which early web architects created to enable browsers to pay for content but which never gained traction because card fees made micropayments impractical. The foundation's premier members include Ripple, Visa, Mastercard, American Express, Stripe, Adyen, Fiserv, Shopify, Google, Amazon Web Services, Cloudflare, Circle, MoonPay, Solana Foundation and Stellar Development Foundation, alongside Coinbase, as the group seeks to turn x402 into a collaborative, vendor-neutral standard for machine-driven internet payments.

Terms & Concepts
  • x402: An internet payment protocol designed to let software, AI agents and online services send and receive payments through standard web infrastructure.
  • HTTP: The core set of web communication rules that lets browsers, servers and internet services exchange requests and responses.
  • micropayments: Very small digital transactions, often used for low-cost content, data access or machine-to-machine services.