Discover the Whole Agent Marketplace in One Call

Circle Internet Financial introduced a public, keyless Discovery API that allows AI agents and applications to find live x402-compatible services accepting USDC across multiple chains, including offerings in market data, web search, creative tools, prediction markets, social intelligence, and infrastructure. The API returns structured information for each service, including its endpoint, input schema, provider details, supported payment methods, network, USDC token address, seller wallet, and price in atomic units, enabling agents to assess and call services programmatically. Users can filter the catalog by category, network, service type, maximum USD price, and supported payment rail, with payments available through onchain x402 transfers or Circle Gateway’s gasless, batched nanopayments. Circle suggests agents can establish a wallet and Gateway balance through its tooling, then discover, pay for, and invoke services in a short automated workflow. Developers can also integrate the API into wallets, agent frameworks, CLIs, or frontends, while Circle says listings are live-checked for availability and sanctions-screened on the seller side. The company notes that its Agent Stack is software rather than a regulated financial or marketplace service, that third-party services and AI agents may carry operational, security, and financial risks, and that users remain responsible for permissions, compliance, and transaction decisions.

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