{"uid":"cap_hvKjF2tsLpA6HSnad_FqQ","slug":"demand-factory-base-block-number-c136f136","name":"Demand Factory Base Block Number","description":"Base mainnet data primitives paid per call with USDC over x402 v2.","url":"https://x402-market-seven.vercel.app/api/base/block-number?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","block_number":36000000}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ePHlnI7kAEedDSryHvGHV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current block number on the Base (EVM chain ID 8453) mainnet network, paid per call via x402.","exampleAgentPrompt":"What is the current block number on Base mainnet right now?","exampleUseCases":[{"title":"Real-time block height monitoring","prompt":"Keep checking the current block number on Base mainnet every few seconds and alert me when it passes block 37 million."},{"title":"On-chain event synchronization","prompt":"Before syncing my records, can you grab the latest block number on Base so I can use it as a checkpoint?"},{"title":"Blockchain data freshness check","prompt":"What block is Base mainnet at right now? I need to confirm whether my cached data from block 35,900,000 is still recent enough."}],"resultDescription":"Returns a JSON object containing the network identifier (e.g. 'eip155:8453' for Base mainnet) and the current block number as an integer (e.g. 36000000), reflecting the latest mined block on Base at the time of the call.","failureModes":["Payment failure or insufficient USDC balance causes 402 Payment Required response","Network congestion on Base RPC may cause stale or delayed block number","Invalid x402 payment header returns authentication/payment error","Service unavailability on Vercel hosting returns 5xx error"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call lookup of the current Base mainnet block number without managing your own RPC node or API key subscription. Ideal for agents that occasionally need the block height as a timestamp proxy, sync checkpoint, or freshness signal on Base (eip155:8453), and are already operating in an x402 micropayment context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:32:18.146Z","isFirstParty":false,"canonicalSlug":"demand-factory-base-block-number-c136f136"}