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ENS / Basename Name Resolver
x402
ENS / Basename Name Resolver is a paid API for AI agents from 138-197-15-135.sslip.io, paid per call via x402, $0.0045/call, status unknown (last checked 2026-10-31).
Resolves ENS (.eth) and Base (.base.eth) names to Ethereum addresses, or reverse-resolves addresses to names, returning registry metadata.
Price / call$0.0045
Success—
StatusUnknown
How this service works
Resolve an ENS name (vitalik.eth) or Basename (jesse.base.eth) to an address, or an address to its verified primary ENS name. On-chain, deterministic, no LLM.
Output
Returns a JSON object containing the original input, the resolved name (if given an address), the resolved 0x address (if given a name), and the registry that matched (e.g. 'ethereum' for ENS or 'base' for Base names). Fields may be null if no resolution is found.
Example use cases
ENS name to address lookup
“Can you find the 0x wallet address that vitalik.eth resolves to on Ethereum?”
Base name resolution for payment
“I want to send USDC to jesse.base.eth — what's the actual 0x address I should use?”
Reverse lookup address to name
“What ENS or Base name is registered to the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?”
Technical details
Endpoint
GEThttps://138-197-15-135.sslip.io/v1/name/resolve?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve ENS (.eth) or Base (.base.eth) names to Ethereum addresses, or perform reverse lookups from 0x addresses to human-readable names, especially when operating in an x402 pay-per-call agent context on Base. Prefer this over full node RPC calls when you want a lightweight REST API without managing Web3 provider connections.
Side effects
- Name not found or unregistered: returns null for address field
- Invalid input format: malformed address or unsupported TLD
- Network timeout or RPC unavailability for ENS/Base registry
- Name exists but has no address record set (resolver not configured)
- Payment failure via x402 results in 402 response before resolution attempt
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "vitalik.eth",
"input": "vitalik.eth",
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"registry": "ethereum"
}
}Tags
x402
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