Get Options Expirations

Retrieve a list of available expiration dates for options tied to a specific underlying symbol. This enables users to explore and select valid expiration dates when analyzing or placing options trades.

Additional response fields (confirmed against a live call): Passing contractSize=true, expirationType=true, and/or strikes=true adds the following fields to each expiration entry:

• contract_size (integer) — number of shares per contract, e.g. 100. Added by contractSize=true.
• expiration_type (string) — one of standard, weeklys, quarterlys, or eom (end-of-month). Additional values may exist for other underlyings/products; this list reflects what's been observed so far. Added by expirationType=true.
• strikes.strike (array of numbers) — all available strike prices, in dollars, for options expiring on that date. Added by strikes=true.

Example entry with contractSize=true and expirationType=true: { "date": "2026-07-31", "contract_size": 100, "expiration_type": "eom" }

Example entry with strikes=true: { "date": "2026-07-17", "strikes": { "strike": [110.0, 115.0, 120.0, ...] } }