Claude was given a billing task and two tools — one to issue an invoice, one to pay it. It played both sides: first issuing a real, signed invoice as the vendor's agent, then independently deciding to settle it as the client's payment agent. Two separate real USDC payments on Base, one conversation, zero human clicks.
Bill now. The agent issues a signed, payable invoice for work already delivered — a real x402 payment just to create the claim.
Settle whenever. The invoice exists independently of payment — anyone holding the ID can pay it later, at their own discretion.
Same agent, either side. Here one agent played both roles — but the vendor and payer can just as easily be two unrelated agents.
Deferred billing is one of 25 mechanics in the toolbox — oracle attestations, escrow, subscriptions, gas/price data, and more, each its own small, real, payable endpoint.
This is one endpoint pair out of the full x402 Toolbox. hlrisk is our other product — a live Hyperliquid liquidation-risk feed with its own agent demo.