{"uid":"cap_9wpxBZ8NiXb2-r91-1yih","slug":"postandshare-multi-chain-evm-balance-lookup-c192ce82","name":"Postandshare Multi-Chain EVM Balance 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/balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","description":"0x-prefixed EVM address"},"network":{"enum":["base","ethereum","arbitrum","polygon"],"type":"string","description":"Chain to read (default base)"}}},"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_6dB6aYbEk4S8Tq-G7nCmP","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":"Fetches the native token balance of an EVM address on Base, Ethereum, Arbitrum, or Polygon via a pay-per-call x402 endpoint.","exampleAgentPrompt":"What's the native token balance of wallet 0x742d35Cc6634C0532925a3b8D4C9b3C5f4b2A1e on Base?","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you check how much ETH is in wallet 0x742d35Cc6634C0532925a3b8D4C9b3C5f4b2A1e on Ethereum right now?"},{"title":"Smart contract treasury audit","prompt":"Look up the native token balance of 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Arbitrum — I need to know what's sitting in that contract."},{"title":"Multichain wallet monitoring","prompt":"Check the MATIC balance of address 0x1234567890abcdef1234567890abcdef12345678 on Polygon for me."}],"resultDescription":"Returns the native token balance (e.g. ETH, MATIC) for the specified 0x wallet address on the requested EVM-compatible chain. The response includes the balance amount tied to the address and network queried.","failureModes":["Invalid or malformed 0x address returns an error response","Unsupported network value returns a validation error","Address with no on-chain activity may return zero balance","Payment failure (x402) if USDC payment is not correctly attached","Network RPC downtime may cause timeouts or empty responses"],"whenToPreferThis":"Use this endpoint when an agent needs a quick, cheap ($0.001 USDC) on-chain native balance read across Base, Ethereum, Arbitrum, or Polygon without setting up direct RPC infrastructure. It is ideal for pay-per-call agent workflows using the x402 micropayment protocol, especially when cross-chain balance checks are needed without integrating multiple RPC providers. Prefer this over full node queries or heavier blockchain data APIs when only native balance is needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T06:31:13.730Z","isFirstParty":false,"canonicalSlug":"postandshare-multi-chain-evm-balance-lookup-c192ce82"}