{"uid":"cap__LzGGiOjmAKF3EkqBhv3E","slug":"ens-basename-resolve-reverse-lookup-5b1f89fe","name":"ENS / Basename Resolve & Reverse Lookup","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/ens-resolve?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"name":{"type":"string","examples":["vitalik.eth","jesse.base.eth"],"maxLength":255,"description":"ENS name or Basename, e.g. vitalik.eth, jesse.base.eth"},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","examples":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],"description":"Address for reverse lookup"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"name":"vitalik.eth","next":["/crypto/contract-info?address=0xd8da6bf26964af9d7eed9e03e53415d37aa96045","/crypto/wallet-snapshot?wallet=0xd8da6bf26964af9d7eed9e03e53415d37aa96045"],"input":"vitalik.eth","address":"0xd8da6bf26964af9d7eed9e03e53415d37aa96045","records":{"url":"https://vitalik.ca","avatar":"eip155:1/erc1155:0xb32979486938aa9694bfc898f35dbed459f44424/10063"},"summary":"vitalik.eth -> 0xd8da6bf26964af9d7eed9e03e53415d37aa96045 (reverse matches: verified)","verified":true,"direction":"forward","checked_at":"2026-10-30T05:40:00Z","is_basename":false,"reverse_name":"vitalik.eth","safe_to_send":true,"contract_check":{"chain":"base","is_contract":false,"eip7702_delegated":false}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yP_p7_EV9WA62eAQpYb3D","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","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 or Basename to an Ethereum address (or reverse-lookup an address to its name), with verification, ENS records, and send-safety checks.","exampleAgentPrompt":"Can you resolve vitalik.eth to its Ethereum address and tell me if the forward and reverse records match so I know it's safe to send funds to?","exampleUseCases":[{"title":"Safe send verification before transfer","prompt":"Before I send USDC to jesse.base.eth, resolve that Basename to its address and confirm the forward and reverse records are verified so I'm not sending to the wrong place."},{"title":"Profile enrichment for onchain user","prompt":"Look up the ENS name vitalik.eth and give me the resolved address, avatar, and any profile URL stored in the ENS records."},{"title":"Reverse lookup of counterparty address","prompt":"I have the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you reverse-lookup its ENS name and tell me if it's verified?"}],"resultDescription":"Returns the resolved Ethereum address, reverse name, verification status (forward-reverse match), ENS records (avatar, URL), whether the address is a contract or EOA on Base, a safe-to-send flag, and suggested next API calls for deeper analysis.","failureModes":["Name not found or not registered — returns null address","Address has no reverse record set — reverse_name is null","Forward-reverse mismatch — verified: false, safe_to_send: false","Invalid address format — 400 validation error","Payment failure or insufficient USDC balance — 402 error","Network timeout resolving ENS — 5xx error"],"whenToPreferThis":"Use this endpoint when an AI agent needs to resolve a human-readable ENS name or Basename to a wallet address before sending funds, or to enrich a wallet address with its ENS identity. Particularly valuable when you need forward-reverse verification (i.e., confirming the name legitimately points to and is claimed by the address) and safe-to-send assurance. Prefer over generic RPC calls when you also want ENS records (avatar, URL) and a contract-vs-EOA check in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:22.840Z","isFirstParty":false,"canonicalSlug":"ens-basename-resolve-reverse-lookup-5b1f89fe"}