How much does it cost for API?

I'm curious about the pricing for your API services. Could you please provide me with some information on the cost of accessing and using your API? Is there a one-time fee, or is it a recurring monthly or annual cost? Additionally, do you offer any discounts or pricing tiers for higher volume users or those who sign up for longer terms? I would greatly appreciate any insights you can offer on the cost structure for your API services.