official_announcement
Circle opens a keyless x402 Discovery API for the Agent Marketplace
One unauthenticated GET now returns live USDC-payable services with payment terms and call schemas.
On 9 September 2026 Circle published that the full Agent Marketplace catalog is available from GET https://api.circle.com/v2/x402/discovery/resources with no API key, account or authentication. Each listing includes an accepts block (network, asset, amount, payTo) and metadata (provider, category, input schema, and payment-rail flags). Circle says listings are health-checked and seller payout wallets are sanctions-screened. This is a discovery catalog, not proof that any listed service has independent demand, and it is not a claim that zFinia is listed.
Why it matters
An agent can now search, price-filter and inspect a payable HTTP contract in one public call. That is a different job from browsing a human marketplace page, and it is still not a substitute for verifying the live 402 before money moves.
Source: Circle