Altum AI has a sandbox endpoint to have a credit-friendly environment to test API integrations.
To use the API's in Sandbox mode, simply add /sandbox/ to the endpoint URL path and perform a POST or GET request depending on the documentation of the specific API. Use API key m2ipzWVV3e9yPU9TduqpY4oZTbcEHCGj31GLVLYB to perform requests to the Sandbox API.

Example sandbox API call to the AVM API

Perform a post request to the AVM API sandbox