> For the complete documentation index, see [llms.txt](https://docs.trybit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trybit.com/start/sdk.md).

# SDK for Work with API

**The SDK** is a set of ready-made functions for calling the Trybit API: it handles request building, passing the authorization key and parsing responses. Using the SDK is optional — you can integrate directly via the API using the code examples in the API Reference V2 section.

### Where to download the SDK

The SDK archive is built for API V2.

{% file src="/files/TplD59s5PwZpnL62Xd0p" %}

### How to connect the SDK

1. **Download** the SDK.zip archive on this page.
2. **Add** the SDK files to your project and include them in your code.
3. **Specify** the API KEY, SHOP ID and SECRET KEY — preferably via environment variables. → [Getting API Keys](/start/get-api-keys.md)
4. **Check that it works:** create a test invoice and process the POSTBACK. → [Testing the Integration](/start/test-integration.md)

### How to integrate without the SDK

All API V2 methods are described with request examples in cURL, Python, JavaScript and PHP. Start with these pages:

* [Request Authorization](/api-reference-v2/authorization.md) — the Authorization header format.
* [Create Invoice](/api-reference-v2/create-invoice.md) — request and response parameters.
* [Automatic POSTBACK](/api-reference-v2/postback.md) — notification parameters and handler examples.

### Where to report an SDK error

If the SDK does not work correctly or you need an SDK for another language, contact our support chat on the website and in the dashboard, or reach us on Telegram. Support contacts are listed on our [website](https://trybit.com/support).


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