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

# Market Created

> Fires when a new prediction market is detected on-chain and enriched with metadata.

<Note>
  **Event:** `market_created` \
  **Cost:** 0.1 credits per delivery
</Note>

Fires when a new prediction market is detected on-chain and enriched with metadata. The full payload schema is in the auto-generated [Market Created callback](/api-reference/webhook-callbacks/market-created-callback) reference; this page documents the filters and matching behavior.

## When to use this

* Auto-list newly created markets in your app the moment they appear.
* Trigger curation or moderation workflows for markets matching specific tags.
* Seed analytics or indexing pipelines as soon as a market is enriched.

## Subscription filters

Add these to the `filters` object when you create the subscription.

| Filter                      | Type      | Description                                                                                                                                                |
| --------------------------- | --------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `event_slugs`               | string\[] | Restrict to specific events by slug (max 500).                                                                                                             |
| `tags`                      | string\[] | Restrict by tag or category, given as the display label shown on Polymarket (e.g. `"Sports"`, `"FIFA World Cup"`), not a slug. Case-insensitive (max 500). |
| `exclude_shortterm_markets` | boolean   | Exclude short-term Up/Down markets.                                                                                                                        |

## Example

```json theme={null}
{
  "url": "https://your-server.com/webhooks",
  "event": "market_created",
  "filters": {
    "tags": ["Politics", "Crypto"],
    "exclude_shortterm_markets": true
  }
}
```