There are two ways to obtain a Free API key. The quick option is to request directly to Support in Telegram
The more useful option is to register on the website, review all available subscription plans, and select the Free plan. By doing so, you gain access to detailed logs of your requests, visibility into how many “credits” each request consumes, and the ability to upgrade instantly to any paid plan when needed.
Please note that the quick method of receiving a Free key through Telegram may not be guaranteed in the future.