Cloudflare and Coinbase are launching the x402 Foundation to establish a universal standard for AI-driven payments, enabling machines to pay for web resources without human intervention 0 protocol converts the HTTP “ 402 Payment Required ” error code into a functional payment system, enabling AI agents to purchase data, services, and content 1 Armstrong, Coinbase’s CEO, called x402 “ a big step forward ” that allows AI agents to “ transact value, not just exchange info .” We're launching the x402 Foundation with @Cloudflare . I’ve been thinking about how internet payments should work for 2 more specifically, how they aren't working, and need to improve.
x402 is a big step 3 agents can now transact value, not just exchange 4 — Brian Armstrong (@brian_armstrong) September 23, 2025 The protocol addresses a fundamental problem in the current payment systems, which were designed for humans clicking “buy” buttons, not machines making millions of automated 5 day, websites send over one billion HTTP 402 error codes to bots trying to access content, but these payment requests go unanswered because no standard exists for machines to 6 x402 protocol solves this by creating a common language for automated 7 initiative comes as Google recently announced similar stablecoin support for AI payments , partnering with Coinbase and the Ethereum Foundation.
Google’s James Tromans said stablecoins represent “ probably one of the most important payment upgrades since the SWIFT network .” Revolutionary Payment Flow Changes Everything for AI The x402 protocol creates a simple four-step process that transforms how machines handle payments 8 an AI agent tries to access restricted content, the server responds with payment instructions, including the amount and recipient 9 agent then sends the payment authorization header along with its request. A payment facilitator verifies the transaction and settles it automatically. Finally, the server delivers the content with confirmation that payment 10 system enables entirely new business models that were impossible with traditional payment 11 AI assistant could automatically buy Halloween costume accessories from multiple 12 trading bots could pay per request for real-time market data feeds, rather than monthly 13 is proposing a “ deferred payment scheme ” that allows batch settlements at the end of each day rather than immediate 14 approach accommodates crawlers that access thousands of pages before receiving a single aggregated bill through traditional payment methods or 15 protocol supports both immediate blockchain settlements and delayed payments through credit cards or bank 16 flexibility ensures compatibility with existing financial infrastructure while enabling the implementation of new automated 17 Infrastructure Powers Machine Economy Growth The timing coincides with explosive growth in stablecoin adoption for AI 18 to a report covered by Cryptonews in June, as of 2024, bots already account for 70% of stablecoin transfer volume, indicating machine-driven transactions are becoming 19 payment rails, such as wire transfers and credit cards, cannot handle the micropayments and instant settlements that AI agents 20 solve these limitations by providing programmable money that settles within seconds at minimal 21 stablecoin market has grown from $4 billion in 2020 to over $280 billion today, with monthly settlement volumes reaching $1.39 trillion in the first half of 22 stablecoin issuers now rank 17th globally in 23 24 has created a live demonstration called the x402 playground , where visitors receive testnet USDC on the Base blockchain.
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