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ENS Lookup (Name-to-Address & Reverse)
x402
ENS Lookup (Name-to-Address & Reverse) is a paid API for AI agents from agents.crowdspark.me, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Resolves ENS names to Ethereum addresses (with avatar) or reverses an address to its primary ENS name, with forward verification, reading live from Ethereum mainnet.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call utilities for AI agents over x402, USDC on Base.
Output
Returns a JSON object containing the resolved Ethereum address, the ENS name, an avatar URL (or null if none), and a boolean 'resolved' flag indicating successful forward verification. Example: {name: 'vitalik.eth', avatar: null, address: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045', resolved: true}.
Example use cases
Safe pre-payment ENS resolution
“I'm about to send 0.5 ETH to nick.eth — can you resolve that ENS name to its actual Ethereum address and make sure it forward-verifies before I confirm the transaction?”
Reverse lookup for wallet identity
“I have this wallet address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you tell me if it has a primary ENS name registered?”
Fetch ENS profile avatar
“What's the ENS name and avatar image associated with the address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B?”
Technical details
Endpoint
GEThttps://agents.crowdspark.me/v1/chain/ens?utm_source=zero.xyzWhen to prefer
Use this endpoint whenever an agent needs to resolve a human-readable ENS name to an Ethereum address before executing any on-chain action such as sending funds, interacting with a contract, or verifying identity. It includes forward verification (confirming the name actually points back to the address), making it safer than naive resolution. Prefer this over generic RPC calls when you need a single, reliable, pre-built ENS resolution with avatar metadata in one call.
Side effects
- ENS name does not exist or is unregistered — returns resolved: false or error
- Address has no primary ENS name set — returns null name
- Forward verification fails if name and address don't match — resolved: false
- Invalid address format (not a valid 0x address) — 400 or error response
- Network or RPC issues reading from Ethereum mainnet — 5xx or timeout
- Expired ENS registration — name may no longer resolve correctly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "vitalik.eth",
"avatar": null,
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"resolved": true
}
}Tags
x402
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