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ENS Reverse Lookup with Forward Verification
x402
ENS Reverse Lookup with Forward Verification is a paid API for AI agents from api.strale.io, paid per call via x402, $0.0216/call, status unknown (last checked 2026-10-12).
Look up the primary ENS name for an Ethereum wallet address, with forward verification confirming the ENS name resolves back to the same address.
Price / call$0.0216
Success—
StatusUnknown
How this service works
Look up the primary ENS name for a wallet address. Includes forward verification to confirm the name actually points back to the address. Returns null if no ENS name is set.
Output
Returns the primary ENS name associated with the wallet address (e.g. 'vitalik.eth'), a boolean has_ens flag, a verified boolean confirming the ENS name forward-resolves back to the same address, and the address itself. Returns null for ENS name if none is set.
Example use cases
Verify user identity in crypto transactions
“I need to check if this Ethereum wallet 0x1234567890123456789012345678901234567890 actually belongs to someone with a verified ENS name. Can you look up their ENS and confirm it resolves back to that address?”
Authenticate wallet in compliance screening
“Before we process this payment, verify that the sender's wallet address 0xabcdefabcdefabcdefabcdefabcdefabcdefabcd has a legitimate ENS name that points back to it. We need to confirm this is a real, verified account.”
Build user-friendly wallet directory
“I'm creating a contact list for our community members. Can you help me get the ENS names for these wallet addresses and make sure each name actually resolves back to its address so we know they're authentic?”
Technical details
Endpoint
GEThttps://api.strale.io/x402/ens-reverse-lookup?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve an Ethereum wallet address to its human-readable ENS name and want confirmation that the name is verified (forward-resolves back to the address). Prefer over raw ENS lookups when trust and authenticity of the ENS record matter.
Side effects
- No ENS name set for the address — returns has_ens: false and ens_name: null
- Invalid or malformed Ethereum address — likely 400 error
- ENS name exists but forward verification fails — verified: false returned
- Payment not provided — returns 402 with payment details
- Network/RPC errors resolving ENS on-chain
Input
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"_meta": {
"payment": {
"method": "x402",
"price_usd": 0.0216,
"settlement_id": "0x4a7dc32df2898f8101b40d6141bd5f28538d38130323292f27586cd01aa19c86"
},
"capability": "ens-reverse-lookup",
"latency_ms": 41,
"provenance": {
"source": "ens.domains (via eth-mainnet.g.alchemy.com)",
"fetched_at": "2026-06-13T04:25:48.645Z"
}
},
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"has_ens": true,
"ens_name": "vitalik.eth",
"verified": true
}Tags
x402
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