If you want to remove the limit of 500 compressions per month, you can upgrade your Developer API account on the account dashboard. The Developer API pricing has a pay-per-compression billing. The Developer API pricing is further explained at https://tinify.com/developers#pricing
Note: Keep in mind that the invoice for the current month will be sent on the 1st of the next calendar month.
How to upgrade:
Log in to view your account dashboard. If you need help with login, please check out the following article: https://help.tinify.com/help/account-login.
In the dashboard menu, select API, or go to https://tinify.com/dashboard/api.
Scroll down and you will find the section Payment details.
Click or tap Add new card.
Enter your credit card details.
Click or tap Upgrade to pay per compression.
You have just upgraded your API account! You can now optimize over 500 compressions each month.