{"name":"Spraay Free Tier","description":"Zero-cost utility endpoints for AI agents. No wallet, no payment, no API key.","version":"1.0.0","endpoints":{"GET /free":"Free tier catalog","GET /free/gas":"Gas prices across 7 EVM chains","GET /free/prices":"USDC/ETH/SOL spot prices","GET /free/chain-status":"Block height & liveness — 7 EVM chains","GET /free/nonce":"Transaction count for an EVM address","GET /free/validate-address":"Multi-chain address validation","POST /free/validate-batch":"BPA 1.0 payload schema validation","GET /free/estimate-batch":"Rough batch cost estimate","GET /free/resolve":"ENS & Basename → address resolution","GET /free/agent-card":"ERC-8004 agent registry lookup","POST /free/x402-check":"Probe URL for x402 payment support","GET /free/convert":"Fiat ↔ crypto conversion","GET /free/timestamp":"Current Unix timestamp","GET /free/uuid":"UUID v4 generator"},"rateLimit":"60 req/min per IP (20 for x402-check)","gateway":"https://gateway.spraay.app","docs":"https://docs.spraay.app","spec":"https://docs.spraay.app/bpa/1.0/"}