> ## Documentation Index
> Fetch the complete documentation index at: https://docs.seesaw.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# get_topic_price_history

> Probability time series of a prediction market

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`

## Parameters

| Name       | Type                  | Required | Default | Notes                          |
| ---------- | --------------------- | -------- | ------- | ------------------------------ |
| `topic_id` | string (uuid)         | ✅        | —       |                                |
| `range`    | `1d` \| `1w` \| `all` |          | `all`   | Only these three windows exist |

## Returns

Points oldest-first, no pagination. Captured live (trimmed):

```json theme={null}
{
  "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`](/mcp/tools/get-topic) to label the series.

## 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."

## Related

[`get_topic`](/mcp/tools/get-topic) ·
[`list_topic_comments`](/mcp/tools/list-topic-comments)