São Tomé and Príncipe offers several visa types to accommodate various travel purposes. Here’s an overview:

1. Tourist Visa

• Purpose: For individuals visiting São Tomé and Príncipe for tourism, leisure, or to visit family and friends.
• Validity: Typically issued for a stay of up to 30 days.

2. Business Visa

• Purpose: For travelers engaging in business activities, attending conferences, or meetings.
• Validity: Generally granted for the duration of the business activity, up to 30 days.

3. Transit Visa

• Purpose: For travelers passing through São Tomé and Príncipe en route to another destination.
• Validity: Usually valid for up to 72 hours.

4. eVisa

• Purpose: An electronic visa available for nationals of countries that require a visa to enter São Tomé and Príncipe.
• Validity: Typically valid for a single entry with a stay of up to 30 days.

Visa Exemptions:

Citizens of the following countries can enter São Tomé and Príncipe without a visa for up to 15 days:

• Angola
• Brazil
• Canada
• Cape Verde
• Equatorial Guinea
• European Union member states
• Guinea-Bissau
• Mozambique
• Portugal
• Timor-Leste
• United States

Additionally, holders of diplomatic or service passports from China, Hong Kong, and Macau do not require a visa for stays up to 30 days. 

Wikipedia

Application Process:

1. Access the Official eVisa Portal: Visit the São Tomé and Príncipe eVisa System.
2. Create an Account: Register with a valid email address.
3. Select the Visa Type: Choose the appropriate visa category based on your travel purpose.
4. Complete the Application Form: Provide accurate personal and travel information.
5. Upload Required Documents: This may include a recent passport-sized photograph, a copy of your passport bio-data page, and other supporting documents relevant to your visa type.
6. Pay the Visa Fee: Fees vary depending on the visa type and duration of stay; payment is made online.
7. Submit the Application: After submission, you’ll receive a confirmation email.
8. Await Processing: Processing times can vary; it’s advisable to apply well in advance of your travel dates.
9. Receive eVisa Approval: Once approved, you’ll receive the eVisa via email. Print a copy to present upon arrival in São Tomé and Príncipe.

Important Notes:

• Passport Validity: Ensure your passport is valid for at least six months beyond your intended stay.
• Supporting Documents: Carry all necessary documents, including proof of accommodation, return tickets, and sufficient funds.
• Health Requirements: Check for any vaccination requirements, such as Yellow Fever, before traveling.

For detailed information and assistance, you can visit the São Tomé and Príncipe Migration and Border Service’s officialwebsite.