You need an embassy visa for Sint Maarten if you have a Jamaican passport
Visa options for Sint Maarten
Visitor visa
Travelers need a visa to visit Sint Maarten for Business or Tourism. A paper or embassy visa is the only visa available for travelers visiting Sint Maarten. The visa is typically a stamp or sticker added to the passport. Travelers must obtain this visa from a local embassy, consulate or visa center before traveling.
This is not offered by sherpa°.
Apply on the government site.