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

# Blnk webhook

> Receive Blnk Core webhook events and inject transactions into Watch for real-time risk evaluation.

<Note>Blnk Watch is currently in beta. [Send us a message](mailto:support@blnkfinance.com)</Note>

Use this endpoint when Blnk Core sends transaction events to Watch through a [hook](/hooks/overview). Watch unwraps the webhook payload, injects the transaction, and evaluates it against your active instructions.

This follows the same evaluation flow as [inject transaction](/watch/reference/inject-transaction). After processing, use [get verdict](/watch/reference/get-verdict) to read the result, or configure `ALERT_WEBHOOK_URL` to receive alerts when rules match.

<Tip>
  See [Getting data into Watch](/watch/integration) for how to register a Core hook that points at this endpoint.
</Tip>

### Body

<ParamField body="event" type="string" required>
  The Blnk webhook event name. For example, `transaction.created`.
</ParamField>

<ParamField body="data" type="object" required>
  The transaction object from Blnk Core. Field names match Blnk transaction naming — `transaction_id`, `amount`, `currency`, `source`, `destination`, `created_at`, `meta_data`, and so on.
</ParamField>

<RequestExample>
  ```bash theme={"system"}
  curl -X POST http://localhost:8081/blnkwebhook \
    -H "Content-Type: application/json" \
    -d '{
      "event": "transaction.created",
      "data": {
        "transaction_id": "txn_123",
        "amount": 1000.00,
        "currency": "USD",
        "source": "balance_123",
        "destination": "balance_456",
        "reference": "ref_001",
        "status": "applied",
        "created_at": "2026-03-16T09:00:00Z",
        "meta_data": {
          "source_country": "US"
        }
      }
    }'
  ```
</RequestExample>

<ResponseExample>
  ```text 200 theme={"system"}
  Transaction txn_123 from webhook event 'transaction.created' processed successfully
  ```

  ```text 400 theme={"system"}
  Error decoding webhook payload
  ```

  ```text 500 theme={"system"}
  Error processing transaction: ...
  ```
</ResponseExample>

### Notes

* If `data.transaction_id` is missing, Watch generates a UUID before evaluation.
* If `data.created_at` is missing, Watch uses the current server time.
* On success, the response body is plain text, not JSON.

***

## Need help?

We are very happy to help you make the most of Blnk, regardless of whether it is your first time or you are switching from another tool.

To ask questions or discuss issues, please [contact us](mailto:support@blnkfinance.com) or [join our Discord community](https://discord.gg/7WNv94zPpx).

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