{"uid":"cap_3OXbXVK59De5I_OrGxPbg","slug":"token-allowance-lookup-0a364bc2","name":"Token Allowance Lookup","description":"Pay-per-request access to CoinGecko, DefiLlama, Alchemy, and Etherscan APIs. No auth, no subscriptions.","url":"https://stablecrypto.dev/api/alchemy/token/token-allowance","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"owner":{"type":"string","description":"Owner address"},"network":{"type":"string","description":"Alchemy network slug, e.g. eth-mainnet, base-mainnet"},"spender":{"type":"string","description":"Spender address"},"contract":{"type":"string","description":"Token contract address"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_10BI6eJBhvoeIskFt2Omb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the ERC-20 token allowance (approved spending amount) for a given owner/spender pair on a specified network","exampleAgentPrompt":"On Ethereum mainnet, what's the USDC allowance that my wallet 0xAbC...123 has approved for the Uniswap v3 router 0xE592...aB5 — look it up using the USDC contract 0xA0b8...eB48?","exampleUseCases":null,"resultDescription":"A string representing the token allowance amount in the token's smallest unit (e.g. wei for ETH-based tokens), indicating how many tokens the spender is approved to transfer on behalf of the owner.","failureModes":["Invalid or malformed Ethereum address for owner, spender, or contract returns an error","Unsupported or misspelled network slug (e.g. 'ethereum' instead of 'eth-mainnet') returns an error","Non-ERC-20 contract address returns an error or zero allowance","Network connectivity or Alchemy node issues may cause timeout or 5xx errors","Zero allowance returned when no approval has been set — not an error, but may be misread as failure"],"whenToPreferThis":"Use this endpoint when you need to check the current ERC-20 token spending allowance between a specific owner and spender on a supported EVM network via Alchemy. Prefer this over raw RPC calls when you want a simple, cost-effective REST interface without constructing raw eth_call payloads. Ideal for DeFi agents auditing approvals, verifying pre-conditions before swaps, or monitoring unlimited approvals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:54:20.960Z","isFirstParty":false}