You need an embassy visa for Bolivia if you have a United States passport
Visa options for Bolivia
Visa on arrival for a maximum of 30 days for Tourism
Travelers need a visa to visit Bolivia for Tourism. Travelers can get a visa on arrival in Bolivia at the port of entry, such as an international airport or border crossing. To get a visa on arrival, travelers must provide the following: - Certificate of Yellow Fever Vaccine; - Proof of round trip ticket or travel itinerary; - Proof of accommodation in Bolivia; - Letter of invitation from the host; - Proof of sufficient funds; - Photocopy of passport biographic page; - Entry and exit stamps from the Bolivian authorities are required every time the traveler enters or leaves Bolivia. Visit the government website for details.
This is not offered by sherpa°.
Apply on the government site.