{"uid":"cap_hmnBCXBESFWxTGJtijlva","slug":"chain-native-balance-lookup-f2d4edac","name":"Chain Native Balance Lookup","description":"Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.","url":"https://x402-gateway-production-1f21.up.railway.app/chain/native-balance?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"network":{"enum":["base","ethereum"],"type":"string","default":"base"}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"status":"ready"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_LnwyPgocOo32uSE3B5kN3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the native token balance for a given Ethereum or Base wallet address, payable via x402 micropayment protocol.","exampleAgentPrompt":"What is the native token balance of wallet 0xAbC1234567890abcdef1234567890abcdef123456 on Base?","exampleUseCases":[{"title":"DeFi portfolio native balance check","prompt":"Can you look up the native ETH balance on Ethereum for wallet 0xdEAD000000000000000042069420694206942069?"},{"title":"Base network agent wallet monitoring","prompt":"Check the native token balance for 0x1234567890abcdef1234567890abcdef12345678 on Base so I know if it has enough to cover gas fees."},{"title":"Multi-wallet balance audit","prompt":"What's the current native balance on Base for the address 0xaBcDeF1234567890aBcDeF1234567890aBcDeF12?"}],"resultDescription":"Returns a JSON object with the native token balance for the given address on the specified network (Base or Ethereum), along with a status field indicating readiness of the response.","failureModes":["Invalid address format (not matching 0x followed by 40 hex characters) returns validation error","Unsupported network value outside of 'base' or 'ethereum' returns enum error","Network timeout or RPC unavailability may return a non-ready status","Payment not included or insufficient USDC micropayment causes x402 payment-required rejection"],"whenToPreferThis":"Use this endpoint when you need a quick, on-demand native token balance (ETH, native Base token) for a specific wallet address on Ethereum or Base networks, especially in autonomous agent workflows where micropayment-per-call pricing ($0.001 USDC via x402) is preferred over subscription-based blockchain data APIs. Ideal when you don't need ERC-20 token balances — only the chain's native asset balance.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:41:32.620Z","isFirstParty":false,"canonicalSlug":"chain-native-balance-lookup-f2d4edac"}