# General concepts

This document gives an overview of the characteristics and common features of the API.

## Environments

The commercetools Frontend project has three environments to work in. The host URL is different for each environment. To learn more about environments in Frontend Studio, see [Working with environments](/frontend-studio/using-environments-in-the-studio.md#access-to-environments).

### Hosts

The commercetools Frontend API hub is hosted at the following URLs:

| Environment | API hub URL |
| --- | --- |
| Production | `https://PROJECT_NAME-COMPANY_NAME.frontastic.live/` |
| Staging | `https://PROJECT_NAME-COMPANY_NAME.frontastic.io/` |
| Development | `https://PROJECT_NAME-COMPANY_NAME.frontastic.rocks/` |

## Related pages

- [Area overview page with navigation](/frontend-api.md)
- [Next page: Representations](/frontend-api/types.md)