Formats
How match length changes volatility.
Livelast 30 days
Archive and upwhole archive
Parameters
All optional, all in the query stringfromdateEarliest date to include, YYYY-MM-DD.
todateLatest date to include, YYYY-MM-DD.
Try it
Your key, sent from your browser straight to the APIPaste your keyGet a free one in a minute
Run it to see your limits
What comes back
In data, read from a real response| Field | Type | Example |
|---|---|---|
formats | list | 3 items |
When it refuses
Every error code| Status | Code | When |
|---|---|---|
| 401 | no_key | No key, a malformed key, or one that is not ours. |
| 402 | upgrade_required | Your plan does not reach this endpoint. The message names the plan that does. |
| 422 | bad_parameter | A parameter is malformed or out of range, named in the message. |
| 429 | rate_limited | Over your rate or allowance. Retry-After says when. |
Related
Prices in bulkPaid
GET /v1/prices/bulkPriced history in bulk for model builders. Prices are history: held from 2016 to 20 March 2026, with no live prices since.CalibrationPaidGET /v1/markets/calibrationImplied probability against what actually happened, by price band. Prices are history: held from 2016 to 20 March 2026, with no live prices since.FavouritesPaidGET /v1/markets/favouritesFavourite win rate and level-stakes return by price and format. Prices are history: held from 2016 to 20 March 2026, with no live prices since.