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ENS / Basename Expiry Checker
x402
ENS / Basename Expiry Checker is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).
Returns expiration date, days remaining, grace period end, registrant address, and registration availability for a .eth or .base.eth name.
Price / call$0.003
Success—
StatusUnknown
How this service works
558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.
Output
A JSON object with the queried name, its network (ethereum or base), whether it is registered, the expiration date (ISO date string), days remaining as a decimal, grace period end date, the record owner's Ethereum address, whether it is free to register, and an explanatory note about the grace/auction process.
Example use cases
Monitor ENS domain expiry before buying
“Check when uniswap.eth expires, how many days are left, and whether it's in the grace period or free to register right now.”
Verify Basename availability for a new project
“Is myproject.base.eth already registered? If so, who owns it and when does it expire?”
Track renewal deadline for owned ENS name
“I own nick.eth — when exactly does it expire and when does my grace period to renew end if I miss the expiry date?”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/ens-expiry?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need authoritative expiry and availability data specifically for .eth or .base.eth names. It covers both Ethereum mainnet ENS names and Base network Basenames in a single call, returning structured expiry metadata including grace period details — more complete than a simple availability check. Prefer it over generic domain RDAP checkers (which may not support ENS) when your use case involves ENS renewal timing, sniping expired names, or verifying ownership.
Side effects
- Name not found or unregistered — fields may return null or registered:false
- Invalid name format (missing .eth suffix) — request rejected
- Network timeout or ENS resolver unavailable — no response
- Name in auction limbo after grace period — status may differ from expected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| name | string | name.eth or name.base.eth |
Output
Schema · Response
{
"type": "json",
"example": {
"free": false,
"name": "vitalik.eth",
"note": "After expiry there are 90 days of grace to renew; then it goes to a temporary auction and becomes available.",
"status": "active",
"expires": "2048-01-31",
"network": "ethereum",
"registered": true,
"record_owner": "0x220866B1A2219f40e72f5c628B65D54268cA3A9D",
"remaining_days": 7790.4,
"grace_period_end": "2048-04-30"
}
}Tags
x402
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