There are three types of e-visas for people traveling to the Republic of Kenya temporarily:
Single Entry Visa:
Issued to persons for a single entry whose nationalities require a visa to enter Kenya either for business, tourism or medical reasons...
Transit visa:
Issued to persons connecting through Kenya to other destinations for a period not exceeding 72 hours. Those connecting flights directly without leaving the airport don’t need to apply for Transit visas...
Courtesy visa:
Issued to Diplomatic, Official and Service passport holders coming into the country on official duties, or transiting through Kenya to a third country for official business or duty. It is also issued to government officials and dignitaries on official duties but holding ordinary passports. It is issued free of charge / gratis...
The e-visa is only available to passport holders from 148 e-visa eligible countries.