{"uid":"cap_RvGBfOMe_qalPJ4vV8iyE","slug":"chain-block-number-9d464432","name":"chain-block-number","description":"Latest block number on Base, Ethereum, Arbitrum, Optimism, Polygon or BSC. $0.01 per call.","url":"https://chain.intel.rallylive.ca/chain/block-number?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hee-1nDYwmtA9wwvy7HkB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the latest confirmed block number on Base, Ethereum, Arbitrum, Optimism, Polygon, or BSC.","exampleAgentPrompt":"What's the latest block number on Ethereum right now?","exampleUseCases":[{"title":"DeFi sync checkpoint verification","prompt":"What's the current block number on Arbitrum? I need to confirm my indexer is caught up to the latest chain state."},{"title":"Cross-chain block height comparison","prompt":"Can you pull the latest block numbers on Base and Optimism so I can compare how far ahead each chain is?"},{"title":"Smart contract deployment timing","prompt":"What block is Polygon on right now? I want to know the exact block height before I deploy my contract."}],"resultDescription":"Returns the latest confirmed block number (an integer) for the requested EVM-compatible chain — Base, Ethereum, Arbitrum, Optimism, Polygon, or BSC — read live from the network at query time.","failureModes":["Unsupported chain identifier returns an error or empty response","Network connectivity issues to the RPC node may cause stale or failed responses","Rate limiting or payment failure (x402) returns a 402 Payment Required response","Chain name typo or unrecognized value may result in a null or error response"],"whenToPreferThis":"Use this endpoint when you need a quick, cheap ($0.01) real-time block height lookup across any of six major EVM chains without running your own RPC node. Ideal for agents that need to synchronize state, timestamp events relative to block height, or verify chain liveness. Prefer this over heavier block detail endpoints when you only need the block number, not full block data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:42:50.732Z","isFirstParty":false,"canonicalSlug":"chain-block-number-9d464432"}