{"service":"Nebulous Agent Data API","payment":{"protocol":"x402","network":"eip155:8453"},"endpoints":[{"route":"GET /pulsechain/head","price":"$0.001","description":"Latest PulseChain block number and timestamp."},{"route":"GET /pulsechain/block-by-timestamp","price":"$0.002","description":"Resolve a Unix timestamp to the nearest PulseChain block (exact, binary search)."},{"route":"POST /seal","price":"$1.00","description":"Timestamp a SHA-256 document hash on-chain (proof of existence)."}]}