# Business Key
URL: https://docs.valsight.ai/business-key/
Description: The Business Key is a unique identifier for each project. It is used when referencing a project in external contexts such as:
The **Business Key** is a unique identifier for each project. It is used when referencing a project in external contexts such as:

* [**Data Export Links**](/data-import-export/)
* [**API Access**](/api-access/)

This key ensures consistent identification across systems and integrations.

## Allowed format

To ensure compatibility, Business Keys must meet the following requirements:

* Minimum of **two characters**
* Must **start with a letter**
* Use **only uppercase letters, numbers, or underscores**
* **No special characters or spaces**

> ✅ Example: `SALES_2025`
> ❌ Invalid: `sales-2025`, `2025_SALES`, `s_25`

Business Keys are set during project creation and can be edited later by users with the appropriate permissions.