You may need a visa for Benin if you have a Singaporean passport
Visa options for Benin
Electronic visitor visa is required for trips longer than 14 days
Travellers need a visa to visit Benin for Business or Tourism for more than 14 days. Travellers do not need a visa if staying for 14 days or less. A Benin eVisa is the fastest and easiest way of obtaining a visa for Benin because travellers can submit their application and supporting documents online. Once the application is approved, travellers receive their eVisa confirmation electronically.
This is not offered by sherpa°.
Apply on the government site.