{"uid":"cap_HiHCBsfqLVPLl5MFAsLB_","slug":"crypto-microdata-wallet-current-balance-x402-071bd773","name":"Crypto Microdata – Wallet Current Balance (x402)","description":"Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.","url":"https://kr-x402-mvp.kgy5612.workers.dev/api/v1/profiler/address/current-balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["wallet"],"properties":{"wallet":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","examples":["0xe4be4d0bd82d8e68203deff81f79ede0529f2617"],"description":"Wallet"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"eth":0,"usdc":0.079,"chain":"base","nonce":0,"wallet":"0xe4be4d0bd82d8e68203deff81f79ede0529f2617","can_pay_gas":false,"can_pay_x402":true,"gas_cost_erc20_transfer_eth":4e-7}},"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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mZh4vhkEOxNGKxMjKvfj9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns current ETH and USDC balances, nonce, gas affordability, and x402 payment eligibility for a given Base wallet address.","exampleAgentPrompt":"What's the current ETH and USDC balance of wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 on Base, and can it afford gas for an ERC-20 transfer?","exampleUseCases":[{"title":"Agent wallet pre-flight check","prompt":"Before my trading agent submits a transaction on Base, check whether wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 has enough ETH for gas and enough USDC to make x402 micropayments."},{"title":"Monitor agent treasury balance","prompt":"What are the current ETH and USDC balances on wallet 0xabc1234567890abcdef1234567890abcdef123456 on Base? I want to know if it's running low before my bot makes its next trade."},{"title":"Debug failed x402 payment","prompt":"My agent just failed an x402 API call — can you check whether wallet 0xe4be4d0bd82d8e68203deff81f79ede0529f2617 actually has USDC and gas on Base right now?"}],"resultDescription":"A JSON object containing: the wallet's current ETH balance, USDC balance, chain name ('base'), account nonce, a boolean indicating whether it can pay gas, a boolean indicating whether it can pay x402 micropayments, and the estimated gas cost in ETH for an ERC-20 transfer.","failureModes":["Invalid wallet address format (not matching ^0x[0-9a-fA-F]{40}$) returns a validation error","Wallet address with no on-chain activity may return zero balances and zero nonce — valid but potentially confusing","x402 payment failure if the calling agent's own wallet has insufficient USDC","RPC or network downtime on Base may cause transient 5xx errors","Missing 'wallet' query parameter returns a 400 bad request"],"whenToPreferThis":"Use this endpoint when an AI agent or trading bot needs a real-time snapshot of a Base wallet's ETH and USDC balances plus gas/payment eligibility, without any API key setup — paying only $0.003 USDC per call via x402. Prefer this over general blockchain explorers or heavier RPC calls when you specifically need the can_pay_gas and can_pay_x402 readiness flags in a single lightweight response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:24.612Z","isFirstParty":false,"canonicalSlug":"crypto-microdata-wallet-current-balance-x402-071bd773"}