> ## 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.

# Developer Tools

> An overview of the developer tools Bolta provides, including the sandbox environment, API documentation, and debugging tools.

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

# Developer Tools

Bolta provides a range of developer tools for fast and convenient API integration.

## API documentation

Detailed documentation for every endpoint, along with code samples in multiple programming languages.

Supported languages: Shell, HTTP, JavaScript, Ruby, Python, PHP, Java, Go

## Sandbox environment

Test the API freely in an environment that offers the same functionality as production.

* **Test keys** (`test_` prefix): Every issuance request is processed virtually. You can validate your integration logic without any actual transmission to the NTS.
* **Live keys** (`live_` prefix): These operate in the production environment, and issuance requests are actually transmitted to the NTS.

> You can create test keys and live keys under [Developer Center > API Keys](/docs/developer-center/api-key).

## Logging

Track API calls and webhook activity to support debugging.

* **Webhook logs**: Monitor the delivery history of events such as issuance completion and failure.

> For webhook setup, see the [Webhook connection](/docs/developer-center/webhook-connection) guide, and for checking logs, see the [Webhook logs](/docs/developer-center/webhook-log) guide.