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US Equity Options Expiration Calendar
x402
US Equity Options Expiration Calendar is a paid API for AI agents from market-calendar.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Returns all US monthly equity option expiration dates for a given year, flagging triple witching months and any Friday-to-Thursday shifts caused by market holidays.
Price / call$0.02
Success—
StatusUnknown
How this service works
US monthly equity option expirations for a year: third Friday, moved to Thursday on a market holiday; flags triple witching.
Output
Returns an array of monthly options expiration objects for the requested year (and optionally a single month), each containing: the expiration date, the canonical third Friday date, a boolean indicating if the date was shifted to Thursday due to a market holiday, and a boolean flagging quarterly/triple witching months. Also includes metadata such as year, data source, summary, disclaimer, and degraded-service flags.
Example use cases
Planning options trades around expirations
“Give me the full list of US equity options expiration dates for 2026, including which ones fall on triple witching and whether any are shifted to Thursday because of a holiday.”
Checking a specific month's expiry
“What is the options expiration date for September 2024, and is it a triple witching date or does it fall on a regular third Friday?”
Automating a trading calendar dashboard
“I need all monthly options expiry dates for 2025 — note which are triple witching months and flag any dates that got moved from Friday to Thursday because of a market holiday.”
Technical details
Endpoint
GEThttps://market-calendar.x402tookit.com/options-expiry?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, machine-readable US equity options expiration dates for a full year or specific month, including automatic holiday-shift detection and triple witching flags. Prefer this over manual calendar lookups or generic holiday APIs that don't account for options-specific rules like the Friday-to-Thursday shift or quarterly expirations.
Side effects
- Year out of supported range (1990–2100) returns an error
- Missing required 'year' query parameter causes a 400-level error
- Month parameter outside 1–12 returns a validation error
- Service degraded flag set if holiday data source is unavailable
- Unexpected network timeout if upstream calendar data is slow
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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