Marketplace · API · x402

quartermaster.surewhynot.app/v1/holiday

Is a date a public holiday in a country (2-letter ISO code)? Returns the holiday name, its types, and the next upcoming holiday that year.

Endpoint	`https://quartermaster.surewhynot.app/v1/holiday`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~49 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	0x5253666c40432f009ebd99908b9cd2a7fd1019cb
method	GET
last updated	2026-11-01T07:09:37.664Z

Use it

Call it (an x402 client pays automatically)

curl -i https://quartermaster.surewhynot.app/v1/holiday
# 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/x402-8ac50c624a6af3f4

Search the whole marketplace from your agent (MCP)

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