{"uid":"cap_ArdXIL-u7ftPdL5vFt5r3","slug":"sift-web-tools-ens-lookup-ea78419c","name":"Sift Web Tools – ENS Lookup","description":"ENS lookup: .eth name to address, or address to verified name. Resolves an .eth name to its address, or an address to its primary ENS name (only returned when the forward record matches).","url":"https://sift.srv1996466.hstgr.cloud/v1/crypto/ens?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","required":["q"],"properties":{"q":{"type":"string","description":".eth name or 0x address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"name":"vitalik.eth","address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/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_5JXOxeXcDmmDjCUlt99pX","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Resolves an ENS name to its Ethereum address, or reverse-resolves an Ethereum address to its ENS name","exampleAgentPrompt":"What Ethereum address does vitalik.eth resolve to?","exampleUseCases":[{"title":"Resolve ENS before sending crypto","prompt":"Before I send ETH, can you resolve alice.eth to its actual 0x wallet address so I know I'm sending to the right place?"},{"title":"Identify ENS name from wallet address","prompt":"Can you look up whether the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 has an ENS name registered to it?"},{"title":"Enrich NFT holder data with ENS","prompt":"I have a list of Ethereum addresses from NFT holders — can you check what ENS name goes with 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B?"}],"resultDescription":"Returns a JSON object containing the resolved ENS name and the corresponding Ethereum 0x address (e.g. {\"name\":\"vitalik.eth\",\"address\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}). Works bidirectionally: pass either an ENS name or an 0x address.","failureModes":["ENS name not registered or has no address set — may return null address or 404","Invalid 0x address format — likely 400 bad request","ENS name with no reverse record — reverse lookup returns no name","Upstream ENS provider or RPC node unavailable — service error","Rate limiting or payment failure — 402 or 429 response"],"whenToPreferThis":"Use this endpoint when an agent needs to resolve a human-readable .eth ENS name to an Ethereum wallet address (or vice versa) before executing a crypto transaction, enriching user profile data, or verifying identity in a Web3 context. Prefer it over querying Ethereum nodes directly because it is a simple pay-per-call REST GET with no Web3 library setup required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-23T18:42:17.095Z","isFirstParty":false,"canonicalSlug":"sift-web-tools-ens-lookup-ea78419c"}