{"uid":"cap_Z3IOAifDhmy5wQcf4VlQS","slug":"evm-token-balance-allowance-checker-39db5796","name":"EVM Token Balance & Allowance Checker","description":"Stable edge-hosted x402 utilities for autonomous agents.","url":"https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/evm-token-balance-allowance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"balance":"12.5","network":"base","allowance":"3"}},"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_kPUytR_Z4VBYmSZPzgjHB","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":"Fetches the token balance and ERC-20 spending allowance for an EVM wallet address on a specified network","exampleAgentPrompt":"Check the USDC balance and allowance approved for the Uniswap router on my wallet 0xAbC...123 on Base network.","exampleUseCases":[{"title":"Pre-trade allowance verification","prompt":"Before I swap tokens on Uniswap, check if my wallet 0xAbC...123 has enough USDC allowance approved for the Uniswap v3 router contract on Base — and also tell me my current USDC balance."},{"title":"DeFi position monitoring","prompt":"What's the current AAVE token balance and how much is approved for the AAVE lending pool spender on my wallet 0xDef...456 on Ethereum mainnet?"},{"title":"Agent treasury balance check","prompt":"My agent wallet is 0x789...GhI — can you look up its USDC balance and check how much is approved for the 1inch aggregator contract on Base?"}],"resultDescription":"Returns a JSON object with the token balance (as a decimal string), the network name, and the current ERC-20 allowance approved for the specified spender address.","failureModes":["Invalid or malformed wallet address returns an error response","Unsupported network name causes lookup failure","Token contract address not found on specified network","Spender address not provided results in missing allowance data","Rate limiting or edge node unavailability may cause transient failures"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a lightweight, pay-per-call EVM token balance and allowance lookup without setting up a full RPC node or indexer. Ideal for autonomous agents operating on Base or other EVM chains that need quick pre-transaction checks at minimal cost ($0.003 USDC per call via x402 protocol).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T06:40:07.016Z","isFirstParty":false,"canonicalSlug":"evm-token-balance-allowance-checker-39db5796"}