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Coinbase’s x402 Payment Protocol Moves to Linux Foundation With Backing From Google, Stripe, and Visa

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Coinbase's x402 Payment Protocol Moves to Linux Foundation With Backing From Google, Stripe, and Visa

The open standard for embedding payments into HTTP interactions aims to become the settlement layer for AI agent commerce, with over 20 founding members spanning tech, payments and crypto.

The x402 protocol, Coinbase’s open standard for embedding stablecoin payments directly into web interactions, has officially moved to the Linux Foundation as the newly launched x402 Foundation opens its doors with a broad coalition of industry heavyweights.

The announcement, made Thursday at the MCP Dev Summit North America, marks the protocol’s transition from a Coinbase-led project to a vendor-neutral, community-governed standard designed to accelerate adoption as AI agents increasingly need to pay for services autonomously.

The foundation’s initial governing body includes Cloudflare and Stripe, and founding members include Adyen, Amazon Web Services, American Express, Ampersend.ai, Ant International, Base, Circle, Fiserv Merchant Solutions, Google, KakaoPay, Mastercard, Merit Systems, Microsoft, Polygon Labs, PPRO, Sierra, Shopify, Solana Foundation, Thirdweb and Visa.

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From HTTP Error Code to Payment Layer

The x402 protocol revives HTTP’s long-dormant “402 Payment Required” status code, turning it into a functional payment handshake. When an AI agent requests a paid resource, the server responds with a 402 status containing machine-readable price and settlement details. The client signs a payment payload and retries the request, and a facilitator verifies and settles the transaction on-chain.

The design supports both fiat and crypto payment methods across multiple blockchains.

The launch comes as the race to build the internet’s AI payment layer intensifies. x402 faces competition from the Machine Payments Protocol, developed by Stripe and Paradigm’s Tempo blockchain, which uses session-based authentication rather than x402’s per-request model.

Google has already integrated x402 into its Agentic Payments Protocol as the default stablecoin rail. The surrounding infrastructure is also expanding: MoonPay last week released the Open Wallet Standard for AI agent wallet interactions, Visa launched its CLI payment tool targeting agent commerce, and Circle built its Nanopayments directly on x402 for sub-cent USDC transactions.

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Coinbase and Cloudflare first announced their intent to create the foundation in September 2025. By placing the protocol under the Linux Foundation’s governance, x402 aims to function as an AI commerce equivalent to SSL, the encryption standard that has become foundational to secure web browsing.

This article was written with the assistance of AI workflows. All our stories are curated, edited and fact-checked by a human.

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Crypto World

Circle to Launch cirBTC Wrapped Bitcoin for Institutions

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Circle to Launch cirBTC Wrapped Bitcoin for Institutions

Stablecoin issuer Circle said it plans to launch its own version of a wrapped Bitcoin, which would put it against incumbents Coinbase and BitGo as it targets institutional users. 

The asset, called cirBTC and announced on Thursday, is set to launch on Ethereum, backed 1:1 by bitcoin (BTC) and aimed at over-the-counter desks, market makers and lending protocols. 

Circle said the asset is designed to provide institutions with a “highly secure and neutral version of wrapped BTC.”

Financial institutions, which have become significant buyers of Bitcoin, have been actively exploring decentralized finance. Wrapped versions of Bitcoin would allow the asset to be used on other chains, such as Ethereum, giving them access to DeFi. 

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In addition to Ethereum, the new asset will also launch on Circle’s layer-1 blockchain Arc and its Circle Mint platform, said Circle. 

Cointelegraph contacted Circle for further details, but did not receive an immediate response. 

Circle joins race led by Coinbase and BitGo

Circle’s new wrapped Bitcoin joins a market currently led by BitGo’s Wrapped Bitcoin (WBTC) and Coinbase Wrapped Bitcoin (cbBTC).

Coinbase’s cbBTC was launched in September 2024 and has a current market capitalization of $5.9 billion and a current supply of 88,800 tokens. 

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BitGo’s wBTC is the dominant wrapped Bitcoin token, with a market capitalization of about $8 billion and 119,157 tokens in circulation. However, that figure is roughly half its November 2021 peak, when Bitcoin hit its cycle all-time high.

Related: WBTC expands to Hedera as Bitcoin liquidity flows into new DeFi rails

WBTC supply has declined over the past few years. Source: Dune

Crypto exchanges launched their own wrapped Bitcoin

Several crypto exchanges have launched variations of wrapped Bitcoin, including Kraken Wrapped BTC (KBTC), Gate Wrapped BTC (GTBTC), Binance Wrapped BTC (BBTC), Huobi BTC (HBTC) and OKX Wrapped BTC (XBTC), but their market caps are a fraction of the two leaders. 

The total combined supply of wBTC and cbBTC stands at roughly 208,000 BTC, according to CoinGecko.

Magazine: Your guide to surviving this mini-crypto winter

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