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x402engine ENS Reverse Lookup
x402
x402engine ENS Reverse Lookup is a paid API for AI agents from x402engine.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Resolves an Ethereum address to its ENS (Ethereum Name Service) human-readable name via a pay-per-call micropayment API.
Price / call$0.001
Success—
StatusUnknown
How this service works
Reverse-resolve an Ethereum address to its ENS name
Output
Returns the ENS human-readable name (e.g. 'vitalik.eth') associated with the provided Ethereum address, or an indication that no reverse record exists for that address.
Example use cases
Identify a wallet's ENS handle
“I just got a transfer from 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — do they have an ENS name registered to that address?”
Enrich on-chain transaction data
“For this list of Ethereum sender addresses from our transaction log, can you look up their ENS names so I can display human-readable identities in the UI instead of raw hex addresses?”
Verify a public figure's wallet identity
“I've seen vitalik.eth mentioned online — can you confirm whether the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 actually resolves to vitalik.eth on ENS?”
Technical details
Endpoint
GEThttps://x402engine.app/api/ens/reverseWhen to prefer
Use this endpoint when you need to resolve a raw Ethereum 0x address to its ENS name, especially in agent workflows that require human-readable Web3 identities or on-chain identity enrichment. Prefer this over building your own ENS resolution when you need a pay-per-call, no-subscription model accessible via HTTP.
Side effects
- Address has no ENS reverse record set — returns null or empty name
- Invalid or malformed Ethereum address — returns 400 or validation error
- Payment failure via x402 micropayment protocol — returns 402
- ENS resolver or upstream node unavailable — returns 500 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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