# API Overview

This document provides a detailed user guide and reference documentation on the Sinch Chatlayer Analytics REST API. For information on how to authenticate API requests, please check the [Authentication](/docs/chatlayer-analytics/api-reference/authentication) page.

Download the OpenAPI Specification [here](/docs/chatlayer-analytics/api-reference/chatlayer-analytics).

## Regions

The API is available in all same regions Chatlayer is hosted. Depending on the region you need to use the correct host.

| Region | Host |
|  --- | --- |
| Europe | `https://analytics.api.chatlayer.ai` |
| US | `https://analytics.api.prod.us-east4.gcp.chatlayer.ai` |
| APAC | `https://analytics.api.prod.asia-south1.gcp.chatlayer.ai` |