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402rpc ENS Resolver
x402
402rpc ENS Resolver is a paid API for AI agents from 402rpc.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Resolves ENS names to Ethereum addresses (forward lookup) or Ethereum addresses to their verified primary ENS names (reverse lookup) using a full Ethereum mainnet node.
Price / call$0.001
Success—
StatusUnknown
How this service works
Resolve ENS on Ethereum mainnet from a full node: name to address (e.g. vitalik.eth) or address to primary name (reverse record, verified forward). Use it to turn human-readable names into payment addresses and to label addresses. Give either name or address.
Output
Returns either the resolved Ethereum address for a given ENS name (forward lookup) or the verified primary ENS name for a given address (reverse lookup, with forward-verification confirmed). Includes the canonical mapping between human-readable name and on-chain address.
Example use cases
Resolve ENS name before sending payment
“Before I send ETH, look up the wallet address for nick.eth so I have the actual 0x address to send to.”
Label wallet address with ENS identity
“I have the Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — does it have a primary ENS name I can use to label it?”
Verify ENS name ownership
“Can you check that alice.eth actually resolves to the address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B and that the reverse record is verified?”
Technical details
Endpoint
GEThttps://402rpc.com/v1/eth/ens?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a trustworthy, full-node-backed ENS resolution without requiring an API key or account — ideal for agents that need to resolve payment addresses on-the-fly, label addresses in transaction history, or verify ENS identity ownership. Prefer over third-party ENS APIs when on-chain accuracy and decentralization matter, or when you want pay-per-call pricing without subscriptions.
Side effects
- ENS name does not exist or has no resolver set — returns null or error
- Address has no primary ENS name set — returns empty reverse record
- Invalid ENS name format — rejected by pattern validation
- Invalid Ethereum address format — rejected by pattern validation
- Neither name nor address provided — missing required query parameter
- Temporary node connectivity issue — returns 5xx error
- ENS name exists but forward/reverse mismatch — reverse record not verified
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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