{"uid":"cap_DP9X_TXt8aUwxz6C3OmLg","slug":"ens-reverse-resolution-7430f529","name":"ENS Reverse Resolution","description":"Reverse-resolve an address to its primary ENS name — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/ens-reverse?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"ens-reverse","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.005,"receipt_id":"g402-<16hex>"},"generated_at":"<iso8601>"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6xqYX0npHVBRikfx2mLH0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Resolves an Ethereum address to its primary ENS (Ethereum Name Service) name","exampleAgentPrompt":"What's the primary ENS name registered to the Ethereum address 0x4bbeEB066eD09B7AEd07bF39EEe0460DFa261520?","exampleUseCases":[{"title":"Identify wallet owner by ENS name","prompt":"I have this Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you look up whether it has a primary ENS name so I know whose wallet this is?"},{"title":"Display human-readable names in transaction history","prompt":"For each of the Ethereum addresses in my transaction log, can you resolve their primary ENS names so I can show something readable instead of raw 0x addresses in my dashboard?"},{"title":"Verify ENS identity before sending funds","prompt":"Before I send ETH to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B, can you check if that address has a primary ENS name so I can confirm I have the right recipient?"}],"resultDescription":"Returns a JSON object indicating success (ok: true), the type field 'ens-reverse', and a receipt containing a transaction hash, USD amount charged, and a unique receipt ID, along with a generated_at ISO8601 timestamp. The primary ENS name for the address is included in the response payload.","failureModes":["Address has no primary ENS name set — returns ok: true but with null or empty name field","Invalid Ethereum address format (not matching ^0x[0-9a-fA-F]{40}$) — returns 400 error","ENS resolver or Ethereum node is unavailable — may return 503 or timeout","Payment failure via x402 protocol — returns 402 Payment Required","Address is valid but ENS reverse record points to a name that no longer forward-resolves to the same address — may return mismatched or stale result"],"whenToPreferThis":"Use this endpoint when you need to translate a raw Ethereum address into a human-readable ENS name, particularly for display purposes, identity verification, or enriching on-chain data. Prefer this over on-chain direct calls when you need a managed, pay-per-use API with receipts and no RPC node setup required. Best suited for agents that already handle x402 micropayments and need ENS reverse lookup as part of a blockchain data pipeline.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T18:55:42.096Z","isFirstParty":false,"canonicalSlug":"ens-reverse-resolution-7430f529"}