Where is it convenient to check (preferably free of charge) the validity of a passport using the API?

Question

API

A person enters his passport data, it is required to check the validity of the passport, 500 requests per day. Where can I conveniently check, knowing the series, number and date of issue?

Answer 1

Correctly and for free here: services.fms.gov.ru/info-service.htm?sid=2000 every day you download the database of invalid passports and check it. And here's how to do it: https://habr.com/en/post/307568/
Wrong: you can take someone else's solution, for example c https://proverk.ru/passport/
You look in the network and see that the request goes to POST https://proverk.ru/ajax.php data: {serial: 1111, number: 123123}. But if they see, they can block your server.