{"uid":"cap_lDGZN1yD9MhCN--aUQ9Ll","slug":"crest-block-preview-1d63ba6d","name":"Crest Block Preview","description":"Crypto market data, DeFi analytics, and x402 ecosystem intelligence via pay-per-request USDC on Base mainnet.","url":"https://data.crestsystems.ai/data/block/preview","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"block":{"chain":"base","number":46074582,"gas_used":12000000,"tx_count":85}}},"example":{"request":{"chain":"base"},"response":{"free":true,"preview":{"chain":"base","block_number":47224991},"upgrade":"GET /data/block/:chain for full block data (hash, timestamp, tx count, gas). Supports base, ethereum, arbitrum, polygon. $0.002 USDC."}},"exampleRequest":{"chain":"base"},"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dEf79PkVozhzMynF3fJxt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a preview of the latest block data for a specified EVM-compatible blockchain chain","exampleAgentPrompt":"What does the latest block on Base look like — block number, gas used, and transaction count?","exampleUseCases":[{"title":"Real-time DeFi liquidity monitoring dashboard","prompt":"Can you check the latest block numbers across Base, Ethereum, and Polygon right now? I want to see which chain has the most transaction activity in the most recent block."},{"title":"On-chain gas tracking for trading execution","prompt":"What's the current gas usage on the latest Arbitrum block? I need to know if it's a good time to execute my transaction or if I should wait."},{"title":"Multi-chain blockchain health status check","prompt":"Give me a quick snapshot of the current block height and transaction count for all the major EVM chains we support — I'm checking overall network health."}],"resultDescription":"Returns a JSON object with block details for the requested chain, including the chain name, current block number, gas used in that block, and the number of transactions included.","failureModes":["Missing required 'chain' parameter returns validation error","Unsupported chain value (not base/ethereum/arbitrum/polygon) returns error","Payment failure via x402 USDC on Base mainnet results in 402 response","Service unavailable or upstream node error returns 5xx response"],"whenToPreferThis":"Use this endpoint when you need a quick, lightweight snapshot of the latest block on a major EVM chain (Base, Ethereum, Arbitrum, Polygon) — especially in pay-per-request workflows where you only want to pay for what you need. Prefer this over heavier RPC node integrations when you just need block number, gas, and tx count without running full node infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T14:25:51.230Z","isFirstParty":false}