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

# market_created

> Fires when a new prediction market appears on Polymarket.

## Filters

| Filter        | Type       | Description                           |
| ------------- | ---------- | ------------------------------------- |
| `tags`        | `string[]` | Only markets with these tags. Max 20. |
| `event_slugs` | `string[]` | Only markets in these events. Max 50. |

Empty filters = all new markets.

## Payload

```json theme={null}
{
  "id": "evt_f6a7b8c9-0d1e-2f3a-4b5c-6d7e8f9a0b1c",
  "type": "market_created",
  "created_at": "2026-05-14T15:11:00.000000000+00:00",
  "data": {
    "condition_id": "0x9622da56d800d10c93c58fe2f6fc19521b3152bc7f9e21fe97979b39749bc58b",
    "question": "Will Ethereum reach $5000 by June 2026?",
    "slug": "will-ethereum-reach-5000-june-2026",
    "event_slug": "crypto-june-2026",
    "tags": "{crypto,ethereum}",
    "image_url": "https://polymarket-upload.s3.us-east-2.amazonaws.com/...",
    "created_at": "2026-05-14 15:10:45.123456"
  }
}
```

## Use Cases

* Market discovery: automatically list new markets on your trading UI
* Analytics: track market creation patterns and categories
* Alert bots: notify users when markets matching their interests appear

## Example

```bash theme={null}
curl -X POST https://api.polynode.dev/v3/webhooks \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://your-app.com/hooks/new-markets",
    "event_types": ["market_created"],
    "filters": {
      "tags": ["crypto"]
    }
  }'
```