Visitors can stay in Panama for up to 90 days if they have a passport valid for at least 3 months and pay 50 Panamanian balboas.1
The tourist visa can be extended for up to 90 more days with a passport valid for at least 3 months.2
All Panamanian visas: https://www.migracion.gob.pa/permisos-migratorios/