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US Market Holiday Check
x402
US Market Holiday Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Checks whether a given YYYY-MM-DD date falls on a known US stock market holiday, returning a boolean flag and the holiday name if applicable.
Price / call$0.001
Success—
StatusUnknown
How this service works
Check if a YYYY-MM-DD is in a static US market holiday set. Call when scheduling around known US market holidays offline. Returns is_holiday and name if known as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a deterministic JSON object with an `is_holiday` boolean and, if the date is a recognized US market holiday, the `name` of that holiday (e.g. 'Thanksgiving Day'). Computed locally with no external dependencies.
Example use cases
Pre-trade date validation for scheduler
“Before placing my automated trade order for November 11, 2025, check if that's a US market holiday so I can reschedule it to the next trading day if needed.”
Holiday-aware earnings calendar filtering
“I'm building a list of trading days for Q1 2026 — can you check if January 19, 2026 is a US market holiday so I can skip it in my earnings calendar?”
Avoiding holiday settlement delays
“Will the US market be closed on December 26, 2025? I want to make sure my settlement doesn't get delayed by a holiday.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/us-market-holiday-checkWhen to prefer
Choose this endpoint when you need a fast, offline, deterministic check of whether a specific date is a standard US market holiday — with no API keys, no live market feeds, and minimal cost. It is ideal for scheduling agents, trade automation pipelines, or calendar tools that need to skip holidays. Prefer it over live market-status APIs when you only need known, recurring US holidays and want predictable latency and near-zero cost.
Side effects
- Invalid date format (non-YYYY-MM-DD) may result in an error or unexpected behavior
- Dates outside the known static holiday set (future years not yet defined) may return false negatives
- Does not account for early market closures (e.g. day before Thanksgiving) — only full holidays
- No live market feed integration; may not reflect newly declared emergency market closures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| date | string | YYYY-MM-DD date |
Output
Schema · Response
{
"type": "json",
"example": {
"schema": "delx/util-us-market-holiday-check/v1",
"is_holiday": true,
"holiday_name": "New Year"
}
}Tags
x402
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