# Authentication
To begin utilizing Optimized.App, it's essential to:
1. Obtain an API Token
Access to the API is granted only through a valid API Token. Note: API Tokens can only be created by an organization administrator. You can generate your token via the Organization Settings section, under Integration -> Api Tokens on the Optimized.App dashboard.

You must include an API token in each request to the Optimized.App API with the Authorization request header.
Example: `Authorization: Bearer [API-TOKEN]`
If an API token is missing, malformed, or invalid, you will receive an HTTP 401 Unauthorized response code.