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ENS & Basename Resolver (x402)
x402
ENS & Basename Resolver (x402) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Resolves an ENS name or Basename to its Ethereum address (or reverse-resolves an address to a name), with verification status and associated records.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
Returns the resolved Ethereum address, the ENS or Basename, direction of resolution, whether forward and reverse records are verified, avatar and URL records, a safe-to-send boolean, contract status on Base (including EIP-7702 delegation), timestamp, and suggested next API calls for deeper onchain exploration.
Example use cases
Pre-transfer ENS safety check
“Before I send 1 ETH to jesse.base.eth, can you resolve that Basename to its actual 0x address and confirm the forward and reverse records are both verified and it's not a contract address?”
Reverse-lookup wallet identity
“I have the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you reverse-resolve it to its ENS name and pull any associated avatar or URL records?”
Onchain agent recipient validation
“My agent needs to send USDC to vitalik.eth — resolve that ENS name, verify the forward and reverse match, and tell me if it's a smart contract or a regular wallet on Base.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/crypto/ens-resolve?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to resolve human-readable ENS names or Basenames to Ethereum addresses before executing onchain actions, or when reverse-resolving addresses to names for display or identity verification. It is specifically useful for safety checks before token transfers because it returns a verified flag and safe_to_send boolean. Prefer this over generic ENS libraries when you need a pay-per-call REST interface with no API key setup, especially in agent pipelines already using x402 micropayments.
Side effects
- ENS name does not exist or has no resolver — returns null address or error
- Reverse record does not match forward record — verified=false, safe_to_send may be false
- Address provided is not a valid 0x40-character hex — 400 validation error
- Name is expired or recently transferred — stale resolution data
- Payment failure via x402 protocol — 402 response if USDC payment not completed
- Network timeout resolving ENS from Cloudflare Worker — transient 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "vitalik.eth",
"next": [
"/crypto/contract-info?address=0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
"/crypto/wallet-snapshot?wallet=0xd8da6bf26964af9d7eed9e03e53415d37aa96045"
],
"input": "vitalik.eth",
"address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
"records": {
"url": "https://vitalik.ca",
"avatar": "eip155:1/erc1155:0xb32979486938aa9694bfc898f35dbed459f44424/10063"
},
"summary": "vitalik.eth -> 0xd8da6bf26964af9d7eed9e03e53415d37aa96045 (reverse matches: verified)",
"verified": true,
"direction": "forward",
"checked_at": "2026-10-30T05:40:00Z",
"is_basename": false,
"reverse_name": "vitalik.eth",
"safe_to_send": true,
"contract_check": {
"chain": "base",
"is_contract": false,
"eip7702_delegated": false
}
}
}Tags
x402
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