Is Gemini API free?

Could you please clarify if the Gemini API is available at no cost? I'm interested in exploring its features and integrating it into my cryptocurrency trading strategies, but I want to ensure there are no hidden fees or charges associated with accessing the API. It would be great if you could provide some insight into the pricing structure of the Gemini API, as well as any potential limitations or restrictions that come with a free account. Thank you for your time and assistance.