{"uid":"cap_tWT8MGAgZMCHNkHybhpId","slug":"postandshare-multi-chain-block-number-lookup-52fa2ab2","name":"Postandshare Multi-Chain Block Number Lookup","description":"x402 pay-per-call data endpoints for AI agents: multi-chain reads (Base, Ethereum, Arbitrum, Polygon) and Nigerian reference data. Format/reference validation only — no personal data, no identity-database lookup.","url":"https://api.postandshare.net/v1/chain/block-number?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"network":{"enum":["base","ethereum","arbitrum","polygon"],"type":"string","description":"Chain to read: base (default), ethereum, arbitrum, polygon"}}},"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":"unknown","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_0Xo8UnQKIlazogxbFvEy6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current (latest) block number for a specified EVM-compatible blockchain network (Base, Ethereum, Arbitrum, or Polygon)","exampleAgentPrompt":"What's the current block number on Base right now?","exampleUseCases":[{"title":"Monitor blockchain sync progress","prompt":"Can you check the current block number on Ethereum so I can see if my node is fully synced?"},{"title":"Verify Arbitrum chain activity","prompt":"What's the latest block number on Arbitrum? I want to confirm the chain is actively producing blocks."},{"title":"Track Polygon block height over time","prompt":"Fetch the current block number on Polygon for me — I'm logging chain height every few minutes to track network activity."}],"resultDescription":"Returns the latest block number (an integer representing the current chain height) for the requested EVM network. This tells you how many blocks have been confirmed on the chain up to this moment.","failureModes":["Invalid or unsupported network name returns an error — only 'base', 'ethereum', 'arbitrum', 'polygon' are accepted","Network RPC node temporarily unavailable returns a 5xx error","Payment failure (x402 USDC payment not accepted) blocks the request","Rate limiting or quota exceeded if too many calls made rapidly"],"whenToPreferThis":"Choose this endpoint when you need a quick, cheap ($0.001 USDC) on-chain block number read across Base, Ethereum, Arbitrum, or Polygon without running your own node. Ideal for agents that need to confirm chain liveness, benchmark sync status, or anchor timestamps to block heights. Prefer this over running a full RPC node when you just need a lightweight, pay-per-call lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:39:39.359Z","isFirstParty":false,"canonicalSlug":"postandshare-multi-chain-block-number-lookup-52fa2ab2"}