{"uid":"cap_LQBpkCO01PNN7GAMQIfjk","slug":"vextorium-evm-block-header-lookup-cbf04f71","name":"Vextorium EVM Block Header Lookup","description":"558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.","url":"https://api.vextorium.com/v1/evm-block?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"number":{"type":"string"},"network":{"enum":["base","ethereum","arbitrum","optimism","polygon","bnb","avalanche","gnosis","line","scroll","sonic","unichain"],"type":"string","description":"Chain (default base)"},"tx_include":{"type":"boolean"}}},"responseSchema":{"type":"json","example":{"date":"2026-10-02T20:04:57+00:00","hash":"0xb6ef30f50b707c8ba2bfff9b57a94ae64540545506de1ac20db38d0216ad80be","number":52091075,"parent":"0x29759d0a3f90560c64e85952a84b1eef7d97f3d039e553cfeb9ceba69378e9a5","network":"base","producer":"0x4200000000000000000000000000000000000011","used_gas":41906338,"gas_limit":400000000,"size_bytes":189493,"transactions":156,"base_fee_gwei":0.005,"gas_usage_pct":10.48}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_qDmb-j3MhFexeqvJUZ-Zi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches block header data (hash, parent, timestamp, producer, gas metrics, base fee, tx count) by block number or tag across 12 EVM-compatible chains","exampleAgentPrompt":"Can you pull the block header for block number 52091075 on Base — I need the hash, parent hash, gas used, base fee in gwei, and how many transactions were in it?","exampleUseCases":[{"title":"Monitor latest block gas fees","prompt":"What's the current base fee in gwei and gas usage percentage of the latest block on Ethereum right now?"},{"title":"Verify block producer on Arbitrum","prompt":"Who produced block 200000000 on Arbitrum, and what was its timestamp and transaction count?"},{"title":"Audit finalized block details on Polygon","prompt":"Fetch the finalized block header on Polygon — I need the hash, parent hash, gas limit, and whether you can include the list of transaction hashes."}],"resultDescription":"Returns a JSON object with block number, hash, parent hash, network name, ISO timestamp, producer address, used gas, gas limit, gas usage percentage, block size in bytes, transaction count, base fee in gwei, and optionally transaction hashes.","failureModes":["Invalid or non-existent block number returns null fields or an error","Unsupported network name causes validation failure","Block tag (latest/safe/finalized) unavailable on some chains returns error","Malformed request body (wrong bodyType or missing required fields) returns 400","Network congestion or node unavailability causes timeout or 5xx error"],"whenToPreferThis":"Use this endpoint when you need structured, normalized block header data across multiple EVM chains in a single unified API — especially useful for multi-chain monitoring, blockchain analytics, or when you need gas metrics and block metadata without running your own node or dealing with raw RPC calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T12:37:56.252Z","isFirstParty":false,"canonicalSlug":"vextorium-evm-block-header-lookup-cbf04f71"}