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Coinbase-Backed x402 Foundation Launches Agent.market for AI Agents

Backed by major tech firms under the Linux Foundation, the x402 standard repurposes HTTP 402 for per-call payments that let agents buy services without API keys.

Overview

  • Agent.market went live Monday as a public app store where AI agents and developers can find, compare, and pay for online services.
  • Listings run on x402, which uses the HTTP 402 “Payment Required” code to trigger instant, per-request payments in USDC and other supported rails without API keys.
  • Dozens of providers are live across seven categories, with OpenAI and Venice for inference, Bloomberg and CoinGecko for data, LinkedIn and X for social, and AWS Lambda and Alchemy for infrastructure, and providers can join without approval.
  • The protocol is now stewarded by the x402 Foundation at the Linux Foundation with backing from Google, Microsoft, AWS, Visa, Mastercard, Stripe, Circle, Base, Polygon Labs, and the Solana Foundation.
  • Reported usage has climbed to about 165 million transactions and roughly $50 million in volume, though sources diverge on active agents, citing about 69,000 to more than 480,000.