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How a prediction market’s option probabilities moved over time. Prediction markets only — poll IDs return 404. REST equivalent: GET /open/v1/topics/{id}/price-history

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Parameters

NameTypeRequiredDefaultNotes
topic_idstring (uuid)✅—
range1d | 1w | allallOnly these three windows exist

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Returns

Points oldest-first, no pagination. Captured live (trimmed): 
{
  "data": [
    {
      "timestamp": "2026-07-03T06:32:30.293853Z",
      "probabilities": [
        { "option_id": "4d995c85-e5c6-4048-989d-e177442db219", "probability": "0.5000" },
        { "option_id": "d502b13a-64f6-4951-8029-b84d59019ce5", "probability": "0.5000" }
      ]
    },
    {
      "timestamp": "2026-07-03T06:35:06.186864Z",
      "probabilities": [
        { "option_id": "4d995c85-e5c6-4048-989d-e177442db219", "probability": "0.5476" },
        { "option_id": "d502b13a-64f6-4951-8029-b84d59019ce5", "probability": "0.4524" }
      ]
    }
  ],
  "next_cursor": null,
  "has_more": false
}
Match option_id against the options array from get_topic to label the series.

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Example prompts

  • “How have the odds on this market moved this week?”
  • “Chart the probability history of the Nasdaq topic and point out the biggest swing.”
get_topic · list_topic_comments