{"uid":"cap_AmlLIWQMefqhshhES3Hek","slug":"block-header-info-base-ethereum-arbitrum-optimism-polygon-c16ff607","name":"Block Header Info — Base, Ethereum, Arbitrum, Optimism, Polygon","description":"Use when you need a block header on Base, Ethereum, Arbitrum, Optimism or Polygon: pass a block number or 'latest'. Returns hash, parent, timestamp, transaction count, gas used and limit, base fee, miner and size. Read-only public data.","url":"https://biosfera.46-62-215-147.sslip.io/o/block-info?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chain","block"],"properties":{"block":{"type":"string","pattern":"^(latest|[0-9]{1,12})$"},"chain":{"enum":["base","ethereum","arbitrum","optimism","polygon"],"type":"string"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_SbLIZ7vbWkiI_IlfLjeDa","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns block header details (hash, parent hash, timestamp, transaction count, gas used/limit, base fee, miner, size) for a given block number or 'latest' on five EVM chains.","exampleAgentPrompt":"Can you fetch the block header for the latest block on Ethereum — I need the hash, timestamp, base fee, gas used, and transaction count?","exampleUseCases":[{"title":"Monitor current gas conditions on Base","prompt":"What's the base fee and gas limit for the latest block on Base right now?"},{"title":"Audit historical block on Arbitrum","prompt":"Pull the block header for block 150000000 on Arbitrum — I need the miner, timestamp, and transaction count."},{"title":"Track Polygon block progression","prompt":"Give me the hash and parent hash of the latest block on Polygon so I can verify chain continuity."}],"resultDescription":"Returns a JSON object with the block's hash, parent hash, timestamp (Unix), transaction count, gas used, gas limit, base fee per gas, miner address, and block size for the specified chain and block number or 'latest'.","failureModes":["Invalid or out-of-range block number returns an error or empty result","Unsupported chain value (not one of: base, ethereum, arbitrum, optimism, polygon) returns a validation error","Block number in the future returns not-found or error","Network or RPC connectivity issues for a specific chain may cause timeouts","Malformed 'block' parameter (not matching pattern ^(latest|[0-9]{1,12})$) returns a schema validation error"],"whenToPreferThis":"Choose this endpoint when you need raw EVM block header metadata (hash, miner, gas, base fee, timestamp, size) for any of the five supported chains (Base, Ethereum, Arbitrum, Optimism, Polygon) by block number or 'latest', and do not need full transaction data or receipts. Ideal for monitoring chain activity, verifying block progression, auditing gas conditions, or enriching on-chain analytics pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T14:28:22.601Z","isFirstParty":false,"canonicalSlug":"block-header-info-base-ethereum-arbitrum-optimism-polygon-c16ff607"}