{"uid":"cap_-0IUwoyapfEr521NwhvFx","slug":"eth-mainnet-eth-blocknumber-5297dbda","name":"ETH Mainnet ETH Blocknumber","description":"Returns the latest Ethereum mainnet block number via eth_blockNumber. Takes no parameters. Base RPC read of an address, block or transaction.","url":"https://ari001.tailb4ac3a.ts.net/v1/ventures/x402_eth_reads_v1/eth_mainnet_eth_blocknumber?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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["ok","service"],"properties":{"ok":{"type":"boolean"},"hex":{"type":["string","null"]},"chain":{"type":"string"},"error":{"type":"string","description":"present when ok is false"},"method":{"type":"string"},"result":{"type":"integer"},"service":{"type":"string"}}}}}}},"responseSchema":null,"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_0YVjbqH_HvAu0vpzzYqU1","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":"Returns the latest Ethereum mainnet block number via the eth_blockNumber RPC method.","exampleAgentPrompt":"What is the current block number on Ethereum mainnet right now?","exampleUseCases":[{"title":"Blockchain sync status check","prompt":"Can you tell me what block Ethereum mainnet is currently on so I can check if my node is synced?"},{"title":"Polling ETH block height in automation","prompt":"Every 30 seconds, fetch the latest Ethereum block number and alert me when it advances by more than 5 blocks."},{"title":"Timestamping events by block","prompt":"What is the current Ethereum mainnet block number? I need it to record the block height at which I'm executing this transaction."}],"resultDescription":"Returns the current Ethereum mainnet block number, typically as a hex string (e.g. '0x12A05F2'), representing the height of the latest confirmed block on the Ethereum mainnet chain.","failureModes":["Upstream Ethereum RPC node unavailable — returns 5xx error","Payment not processed correctly — returns 402 Payment Required","Block number temporarily stale if upstream node is lagging","Network timeout if the backing RPC is slow to respond"],"whenToPreferThis":"Use this endpoint when you need a quick, cheap, single-purpose lookup of the current Ethereum mainnet block number without constructing a full RPC call yourself. Ideal for agents that need to timestamp events by block height, check chain tip progression, or verify node sync status. Prefer this over a full Ethereum node RPC client when you want a pay-per-use, no-infrastructure approach.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T12:37:57.854Z","isFirstParty":false,"canonicalSlug":"eth-mainnet-eth-blocknumber-5297dbda"}