> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cargado.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authorization and Testing

When you sign up for an account, we make you a pair of API Keys: one for production and one for our sandbox environment in which no real freight is posted or executed. You can create and revoke API keys from the dashboard and should securely store them using a secret management system.

Production API requests should be to `https://api.cargado.com` and sandbox requests should be to `https://api.sandbox.cargado.com`. Set the `Api-Key` HTTP request header to the API key for the appropriate environment.