You need to have a valid OpenAI (https://openai.com/pricing)for using this script. It is a 3rd party AI service provider and they provide a paid service. For Text to Speech service, you need to have a valid Google Cloud account. Only admin are able to add their API key,

API Use Disclaimer: This API is provided “as is” with no warranties, and we do not guarantee its accuracy or reliability. Users are responsible for adhering to all applicable terms and ensuring compliance with intellectual property laws. We are not liable for any losses or damages resulting from the use of this API. API functionalities and terms are subject to change without notice.

You will need to make sure your server meets the following requirements:

PHP 8.2.4 , MySQL = 5.7.23 or Maria DB 10.4+ Apache Laravel Framework: 10.0,

Its support Shared hosting server and VPS both.