# Polymarket API: List trending markets

> Lists the open Polymarket markets with the most trading in the last 24 hours. You can pick one category or list all of them; markets outside the named categories are labeled Other.

Unofficial. Not affiliated with or endorsed by Polymarket.

- Page: https://fous.com/methods/polymarket.com/list-trending-markets
- Method: `polymarket.com/list_trending_markets`, version 1
- Website: polymarket.com
- Returns: question, leading outcome and chance, 24h and total volume, end date, category, link
- Effect: read (it gets data and changes nothing)
- Sign-in: none needed
- Cost: 1 credit per completed run (1¢ with pay as you go); failed runs are free
- Verified: Nov 2, 2026

## Inputs

| Field | Type | Required | In the run below | Description |
|---|---|---|---|---|
| `category` | string | no |  | Category to list, such as crypto; all includes every category. One of "all", "politics", "crypto", "sports", "economy", "tech", "culture". Default "all". |
| `max_results` | integer | no |  | Maximum number of markets to return, such as 20 (up to 50). Default 20. |

## Output

From a run on Oct 23, 2026, shortened. Its input:

```json
{}
```

Its output:

```json
{
  "markets": [
    {
      "link": "https://polymarket.com/event/fed-decision-in-october-20260617190323537",
      "slug": "will-there-be-no-change-in-fed-interest-rates-after-the-october-2026-meeting-20260617190324031",
      "category": "Economy",
      "end_date": "2026-10-29",
      "question": "Will there be no change in Fed interest rates after the October 2026 meeting?",
      "market_id": "2589812",
      "volume_24h_usd": 1253793.38,
      "leading_outcome": "Yes",
      "total_volume_usd": 16745783.93,
      "leading_chance_percent": 93.5
    },
    {
      "link": "https://polymarket.com/event/balance-of-power-2026-midterms",
      "slug": "2026-balance-of-power-r-senate-r-house-537",
      "category": "Politics",
      "end_date": "2026-11-04",
      "question": "2026 Balance of Power: R Senate, R House",
      "market_id": "562831",
      "volume_24h_usd": 1176891.6,
      "leading_outcome": "No",
      "total_volume_usd": 10986110.99,
      "leading_chance_percent": 92.5
    },
    {
      "link": "https://polymarket.com/event/wta-fernand-alexand-2026-10-22",
      "slug": "wta-fernand-alexand-2026-10-22",
      "category": "Sports",
      "end_date": "2026-10-30",
      "question": "Ningbo Open: Leylah Fernandez vs Ekaterina Alexandrova",
      "market_id": "6015462",
      "volume_24h_usd": 1024591.96,
      "leading_outcome": "Leylah Fernandez",
      "total_volume_usd": 911149.06,
      "leading_chance_percent": 99.95
    }
  ]
}
```

## Run it

From code, with a Fous API key in `FOUS_API_KEY`; the answer's `data` holds the output:

```bash
curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"method":"polymarket.com/list_trending_markets","input":{}}'
```

From an AI agent connected to the Fous MCP server: its `run` with the same method and input. To connect one, give it `set up https://fous.com/SKILL.md`.

## Ask your agent

- Show me the top 10 most traded prediction markets in the last 24 hours on Polymarket in the crypto category
- What markets are seeing the biggest trading volume today across all categories?
- List 25 trending sports betting markets with their leading outcome and 24h volume
- Which economy prediction markets are most active right now? Give me up to 15 with end dates
- Find the hottest politics markets by 24-hour volume, including their current leading odds and links

## Input schema

```json
{
  "type": "object",
  "properties": {
    "category": {
      "enum": [
        "all",
        "politics",
        "crypto",
        "sports",
        "economy",
        "tech",
        "culture"
      ],
      "type": "string",
      "default": "all",
      "description": "Category to list, such as crypto; all includes every category."
    },
    "max_results": {
      "type": "integer",
      "default": 20,
      "maximum": 50,
      "minimum": 1,
      "description": "Maximum number of markets to return, such as 20 (up to 50)."
    }
  }
}
```

## Output schema

```json
{
  "type": "object",
  "required": [
    "markets"
  ],
  "properties": {
    "markets": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "link": {
            "type": "string"
          },
          "slug": {
            "type": "string"
          },
          "category": {
            "type": "string"
          },
          "end_date": {
            "type": [
              "string",
              "null"
            ]
          },
          "question": {
            "type": "string"
          },
          "market_id": {
            "type": "string"
          },
          "volume_24h_usd": {
            "type": "number"
          },
          "leading_outcome": {
            "type": [
              "string",
              "null"
            ]
          },
          "total_volume_usd": {
            "type": "number"
          },
          "leading_chance_percent": {
            "type": [
              "number",
              "null"
            ]
          }
        }
      }
    }
  }
}
```

## See more

- [Polymarket API: Search markets](https://fous.com/methods/polymarket.com/search-markets.md): Finds Polymarket prediction markets about a topic, ranked by total trading volume, with outcome chances and market details.
- [Polymarket API: Get odds history](https://fous.com/methods/polymarket.com/get-odds-history.md): Shows how a Polymarket outcome's chance changed over time, from a market question or a Polymarket link. For a text question it uses the highest-volume matching market.
- [CoinGecko API: List crypto categories](https://fous.com/methods/coingecko.com/list-crypto-categories.md): Lists CoinGecko crypto sectors by market cap with daily change, volume, leading coins and category pages, optionally filtered by name or link.
- [Twitch API: List top categories](https://fous.com/methods/twitch.tv/list-top-categories.md): Lists Twitch games and categories ranked by current live viewers, with content tags, box art and category links.
- [Kalshi API: Search markets](https://fous.com/methods/kalshi.com/search-markets.md): Find Kalshi prediction events about a topic, ranked by total contracts traded, with Yes prices, outcome volumes and status. Settled chances show the resolved result; closed outcomes have no live buy or sell prices. Older closed markets may lack 24-hour volume; very broad searches cover up to 1,000 matches.
- [Google API: List trending searches](https://fous.com/methods/trends.google.com/list-trending-searches.md): Lists Google Trends 'Trending now' searches for a country, time window and category, in Google's order. Each search comes with its volume, activity, related searches and news headlines.
- [Similarweb API: List top websites](https://fous.com/methods/similarweb.com/list-top-websites.md): Lists Similarweb's most visited websites for a category and country, with rankings and engagement figures for the reported month. Anonymous view limits may restrict results, especially for country rankings.
- [CoinGecko API: List trending coins](https://fous.com/methods/coingecko.com/list-trending-coins.md): Lists up to 15 of the most-searched coins on CoinGecko in trending order, with price and 24-hour change in the chosen currency. Non-USD prices may be unavailable for some coins.
- [All Polymarket methods](https://fous.com/methods/polymarket.com.md)