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

# Webhook Events

> Describes how Bolta delivers webhooks and which event types each product sends.

<Note>
  Some links point to the service guide, which is in Korean.
</Note>

## Webhook Overview

Bolta asynchronously sends tax invoice and cash receipt issuance and cancellation results to your registered webhook URL. Bolta delivers events as JSON via HTTP POST and supports HTTPS only.

> For webhook URL setup, see the [Webhook Connection Guide](/docs/developer-center/webhook-connection). Register a URL for the test and live environments separately.

## Firewall Settings

If the server that receives webhooks runs a firewall, add the IP address below to your inbound allowlist. It applies to both the test and live environments.

* `43.201.136.252`

## Event Types by Product

| Product      | Event types                                                    | Details                                                                 |
| ------------ | -------------------------------------------------------------- | ----------------------------------------------------------------------- |
| Tax invoice  | `TAX_INVOICE_ISSUANCE_SUCCESS`, `TAX_INVOICE_ISSUANCE_FAILURE` | [Tax Invoice Webhooks](/en/docs/api-introduction/webhook-tax-invoice)   |
| Cash receipt | `CASH_RECEIPT_ISSUED` and 4 more                               | [Cash Receipt Webhooks](/en/docs/api-introduction/webhook-cash-receipt) |

Each product page carries the payload examples, field descriptions, and delivery timing.

## When a Webhook Does Not Arrive

Check any event you have not received with the status API. Use [Retrieve Tax Invoice](/en/api-reference/tax-invoice-retrieval/retrieve-tax-invoice) for tax invoices and [Retrieve Cash Receipt Status](/en/api-reference/cash-receipt/retrieve-cash-receipt-status) for cash receipts.

## Checking Webhook Logs

Review the success and failure history of sent webhooks in the [Developer Center > Event Logs](/docs/developer-center/webhook-log).