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ENS Reverse Resolution
x402
ENS Reverse Resolution is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Resolves an Ethereum address to its primary ENS (Ethereum Name Service) name
Price / call$0.005
Success—
StatusUnknown
How this service works
Reverse-resolve an address to its primary ENS name — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object indicating success (ok: true), the type field 'ens-reverse', and a receipt containing a transaction hash, USD amount charged, and a unique receipt ID, along with a generated_at ISO8601 timestamp. The primary ENS name for the address is included in the response payload.
Example use cases
Identify wallet owner by ENS name
“I have this Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you look up whether it has a primary ENS name so I know whose wallet this is?”
Display human-readable names in transaction history
“For each of the Ethereum addresses in my transaction log, can you resolve their primary ENS names so I can show something readable instead of raw 0x addresses in my dashboard?”
Verify ENS identity before sending funds
“Before I send ETH to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B, can you check if that address has a primary ENS name so I can confirm I have the right recipient?”
Technical details
Endpoint
POSThttps://twin.unykorn.org/ens-reverse?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to translate a raw Ethereum address into a human-readable ENS name, particularly for display purposes, identity verification, or enriching on-chain data. Prefer this over on-chain direct calls when you need a managed, pay-per-use API with receipts and no RPC node setup required. Best suited for agents that already handle x402 micropayments and need ENS reverse lookup as part of a blockchain data pipeline.
Side effects
- Address has no primary ENS name set — returns ok: true but with null or empty name field
- Invalid Ethereum address format (not matching ^0x[0-9a-fA-F]{40}$) — 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "ens-reverse",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.005,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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