Marketplace · API · x402

domain-age-checker.underscoredone.com/lookup

Send a list of domain names and this tool tells you exactly how old each one is, when it was first registered, when it expires, and how much time is left before expiration. Great for spotting brand-new suspicious domains, researching competitors, or evaluating domains before buying or linking to them. Works with over 100 domain extensions worldwide.

Endpoint	`https://domain-age-checker.underscoredone.com/lookup`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~100 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08
method	POST
last updated	2026-10-27T09:48:17.836Z

Use it

Call it (an x402 client pays automatically)

curl -i https://domain-age-checker.underscoredone.com/lookup
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-d988a3011a4ea98b

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

Domain name availability (AIPayGen)
API$0.002/call

domain-age-checker.underscoredone.com/lookup

Use it

Related