public-pm-data

Probability history for one outcome of an event

Native venue price history for ONE outcome of the event: the Yes leg of a binary market, else the first live outcome by sort order (not resolved, voided or closed), else the first outcome. outcome names it; on a multi-outcome event, use event detail for the others.

Polymarket and Kalshi only. Other venues answer 200 with points: [], which means "not served here", not "no trading".

interval is a lookback range, not a bucket size. The venue picks point spacing (Polymarket 1d: about one point per minute). Depth still varies by venue: check coverage.probabilityHistoryStartDay on /sources before assuming a long window exists.

get/api/prediction-markets/event/{source}/{slug}/price-history

Request

  • Base URL: https://api.coinrithm.com
  • URL: https://api.coinrithm.com/api/prediction-markets/event/{source}/{slug}/price-history
  • Auth: none required

Path parameters

source'polymarket' | 'kalshi' | 'rothera' | 'limitless' | 'smarkets' | 'manifold' | 'metaculus' | 'predictit' | 'futuur' | 'myriad' | 'forecastex' | 'gemini' required
slugstring required

Query parameters

interval'1h' | '6h' | '1d' | '1w' | '1m' | 'max'

Lookback range. Aliases 24h, 7d, 30d and all map to 1d, 1w, 1m and max; any other value is served as 1w. The response echoes the range actually served.

Response

Probability points for one outcome, oldest first

sourcestring required
slugstring required
intervalstring required

The range served, in canonical form (1h, 6h, 1d, 1w, 1m or max).

Changes

No recorded changes to this operation across all 1 revision of this API.