{"uid":"cap_vGzGOUF8_BySjdf8JU8XW","slug":"eth-ens-resolve-a2d5751d","name":"ETH ENS Resolve","description":"ENS resolver on Ethereum mainnet: pass name (an ASCII .eth name, e.g. vitalik.eth) to get its address, or pass address (0x + 40 hex) to get its verified primary ENS name. One paid call, USDC on Base.","url":"https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/eth_ens_resolve?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"name":{"type":"string","description":"an ASCII .eth name (forward), OR"},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"0x + 40 hex (reverse, verified)"}}}},"additionalProperties":false}}},"responseSchema":null,"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_vX-lpAAJxTDUWpMumpTO5","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":"Resolves an ENS .eth name to its Ethereum address (forward lookup), or resolves an Ethereum address to its verified primary ENS name (reverse lookup).","exampleAgentPrompt":"What Ethereum address does vitalik.eth resolve to? And can you also do the reverse — what's the primary ENS name for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?","exampleUseCases":[{"title":"Resolve ENS name to wallet address","prompt":"I want to send some ETH to friedberg.eth — can you look up what Ethereum address that ENS name actually points to before I send anything?"},{"title":"Identify wallet owner by ENS name","prompt":"I've got this Ethereum address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B — does it have a registered ENS name I can use to identify who this is?"},{"title":"Enrich transaction data with ENS labels","prompt":"For each of these wallet addresses in my CSV, can you look up their primary ENS names on Ethereum mainnet so I can display human-readable labels instead of raw 0x addresses?"}],"resultDescription":"Returns either the resolved Ethereum address (0x hex) for a given .eth ENS name, or the verified primary ENS name string for a given Ethereum address. The result confirms the bidirectional mapping as registered on Ethereum mainnet.","failureModes":["ENS name not registered or has no resolver set — returns null or empty result","Address has no verified primary ENS name set — reverse lookup returns nothing","Invalid address format (not 0x + 40 hex) — request rejected","Name not a valid .eth ASCII domain — request rejected","Ethereum mainnet node unavailable — service error","Neither name nor address provided — missing required query param error"],"whenToPreferThis":"Use this endpoint when you need to resolve ENS names to Ethereum addresses or perform verified reverse lookups (address to ENS name) on Ethereum mainnet. It handles both directions in a single paid call at $0.003 USDC. Prefer this over manually querying ENS contracts when you need a simple, agent-callable API without managing your own Ethereum node or ENS SDK.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:40:39.250Z","isFirstParty":false,"canonicalSlug":"eth-ens-resolve-a2d5751d"}