Agent Escrow (conditional payment) ($0.005/call)

Lock credits for a payee until a condition is met. POST {payee, amount_credits, condition?} — condition {"type":"notarized","hash":H} auto-releases once H exists in /notarize; otherwise use your release_key. GET ?id= shows state. House fee 20% on release. PREREQUISITE: hold amount_credits credits first — POST /credits/buy ($0.010 = 1 credit), balance at GET /credits. Short balance answers 409, not 402.

Paid endpoint: $0.005 per call via the x402 protocol (USDC on Base). An unpaid request returns 402 with payment requirements in the PAYMENT-REQUIRED response header; attach payment and retry.