{"sample":true,"free":true,"note":"Static example of the paid response shape (not live data). Drop sample=1 and pay via x402 for live data. Failed calls (4xx/5xx) are never charged.","path":"/crypto/ping","price_usdc":"0.001000","pay_url":"https://kr-x402-mvp.kgy5612.workers.dev/crypto/ping?echo=my-agent-1","input_schema":{"type":"object","properties":{"echo":{"type":"string","maxLength":64,"description":"Optional string echoed back (correlate your test call)","examples":["my-agent-1"]}},"additionalProperties":false},"example":{"ok":true,"t":"2026-10-28T14:00:00Z","next":["/crypto/base-gas","/crypto/prices","/crypto/token-risk"]},"start_here":"https://kr-x402-mvp.kgy5612.workers.dev/crypto/ping"}