> For the complete documentation index, see [llms.txt](https://docs.prophetmarket.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.prophetmarket.ai/get-started/api/market-data.md).

# Market Data

The public `markets` connection provides paginated access to the full market catalog.

## Listing Markets

```graphql
query Markets($input: MarketsInput) {
  markets(input: $input) {
    totalCount
    pageInfo { hasNextPage endCursor }
    edges {
      node {
        id
        slug
        question
        status
        yesPriceBps
        noPriceBps
        volumeCents
      }
    }
  }
}
```

### Filtering and Sorting

The `MarketsInput` accepts `first`, `after`, `sort`, and a `filter` object.

```json
{
  "input": {
    "first": 50,
    "filter": {
      "status": "OPEN",
      "categorySlug": "crypto",
      "search": "bitcoin"
    },
    "sort": "VOL4j7_DESC"
  }
}
```

Available filters include `status`, `categorySlug`, `topicSlug`, `search` (full-text), `creatorId`, and resolution date ranges (`resolvesAfter`, `resolvesBefore`).

## Single Market Fetch

Fetch a single market by ID or slug:

```graphql
query SingleMarket {
  market(id: "3bc02387-3f09-4fdd-bea9-d2b6cdd1331a") {
    question
    status
  }
  marketBySlug(slug: "btc-hits-66-422-by-aug-7") {
    id
    resolutionDate
  }
}
```

## Categories and Topics

Markets are organized into categories and topics.

```graphql
query CategoriesAndTopics {
  categories {
    name
    slug
    marketCount
    totalVolumeCents
  }
  topics(categorySlug: "crypto", limit: 10) {
    name
    slug
    marketCount
  }
}
```

## Betting Limits

The `marketBetLimits` query returns the minimum and maximum allowed bet sizes for a specific market.

```graphql
query Limits($marketId: String!) {
  marketBetLimits(marketId: $marketId) {
    minBetCents
    maxBetCents
  }
}
```

{% hint style="warning" %}
**Limits vary by market**

While global defaults exist in `bettingConfig`, individual markets may have specific overrides. Always check `marketBetLimits` before placing an order.
{% endhint %}


---

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