I will visit Minsk for 5 days without a visa (this has taken effect from this February) but one of the requirement is the medical insurance.
To enter the Republic of Belarus in the visa-free regime via the checkpoint “Minsk National Airport”, foreign nationals must have the following documents:
a valid ordinary passport or another substituting document for traveling abroad;
financial means: at least 25 Euro (or equal amount in dollars or Belarusian rubles) for each day of stay;
medical insurance with coverage for at least 10,000 Euros that covers the territory of Belarus.
The information is from Ministry of Foreign Affairs.
However, I have a credit card that compensates for any medical expenditures while traveling. Can I use this card and avoid spending extra money on the insurance program at the border control?
This page titled "Welcome To Belarus: 11 FAQs On Visa-Free Entry" wrote the following but the link on the page is just the same link above, which doesn't prescribe whether the insurance by a credit card company is acceptable.
medical insurance with coverage for at least 10,000 Euros that covers the territory of Belarus. It can be an insurance from “Belgosstrakh” or “Eximgarant” which you can buy on the border (at the airport or border control look for a window that says “Obligatory medical insurance”), or it can be an international insurance if it covers Belarus.