# GET /v4/campaigns/tx

_Merkl API_

> Get campaign IDs from a creation transaction hash

Retrieve the campaign ID(s) created by a given campaign-creation transaction hash.

### Query parameters

- `hash` (string) _(required)_
- `chainId` (string | number) _(required)_

## Responses

- **200** Response for status 200

## Example request

```bash
curl -X GET "https://api.merkl.xyz//v4/campaigns/tx?hash=<hash>&chainId=<chainId>" \
  -H "x-api-key: YOUR_API_KEY"
```