> For the complete documentation index, see [llms.txt](https://resources.atriptech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.atriptech.com/api-document/product-guides/extensions-and-integrations.md).

# Extensions & integrations

Use this section for Atlas extensions and integrations outside the main booking and post-booking flows.

Start here when you need to:

* add webhook or notification delivery
* use Atlas data outside the transaction flow
* implement airline-specific or special-case integrations

### Main groups

#### Notifications and webhook delivery

Use [Webhook Overview](/api-document/product-guides/extensions-and-integrations/webhook-overview.md) for event coverage and handling.

Use [Multi-channel Notifications](/api-document/product-guides/extensions-and-integrations/multi-channel-notifications.md) for channel setup and delivery options.

#### Flight data and shopping support

Use [Flight Data Feed](/api-document/product-guides/extensions-and-integrations/flight-data-feed.md) when you need scheduled fare delivery for your own data layer.

#### Special programs

Use [Special Integrations](/api-document/product-guides/extensions-and-integrations/special-integrations.md) when the business case requires airline-specific or resident fare logic.

### Need exact endpoint fields?

Use [API Reference](/api-document/api-reference.md).