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

# Cancel Auto-renew Rental

> Cancel an ongoing bandwidth rental and undelegate it

## Cancel Auto-renew Rental

Stops billing and undelegates the bandwidth immediately.

### Path parameters

<ParamField path="rental_id" type="number" required>
  Rental id — the `id` returned by Start Auto-renew Rental
</ParamField>

### Response

<ResponseField name="id" type="number">
  Unique rental identifier
</ResponseField>

<ResponseField name="status" type="string">
  Rental status — `cancelled` on success
</ResponseField>

<ResponseField name="undelegate_txid" type="string">
  On-chain undelegation transaction id
</ResponseField>

### Example

```bash theme={null}
curl -X POST https://api.tronrental.com/v1/bandwidth/rentals/4321/cancel \
  -H "X-API-Key: your_api_key"
```

```json Response theme={null}
{
  "id": 4321,
  "status": "cancelled",
  "undelegate_txid": "def456..."
}
```