US Embassy US Consulates around the world 
These are the details for the US Embassy Ottawa as well as the Consulates in Canada. You will note that contact details as well as office hours for the Embassy as well as all the Consulates. Always check if they are open before you arrive as they are closed on Canadian as well as on US public holidays. Also ensure that you have made an appointment and that you have all the correct documents with you.
US Embassy in Costa Rica
These are the details for the US Embassy in Costa Rica. If you need assistance as an American the you can contact the Embassy. If you are going to apply for a US visa which is mostly the US tourist visa then see the process for that. You will also need to complete the DS160 form online for the US Embassy in San José. See the contact details below for a map, office hours and their telephone number and email address.