Conversions are measured in credits. Every API has CreditsCost property which shows how many credits each conversion costs. For example Web2Pdf API cost one credit for one conversion.
Yes, it takes only several seconds.
Yes, you can cancel your plan at any time.
You may change payment scheme at any time from monthly plan to one-time plan and vise versa. Also upgrade/downgrade monthly plans.
No.
Yes. The one-time credits are not expiring.
Yes. Monthly plan credits will be used first and then one-time credits.
If you will use all your credits the API will continue work. You will receive an email notification and have chance to buy more credits.
Please contact us and we will work something out.
If you have any other questions, please contact us.