How do I add my Advance Passenger Information (API)? Log in... My Eurotunnel account holders - Log into your account, (using your registered email address and password) and select "Add API" on your upcoming booking. Other booking types - click here to log in using your booking reference number and password (found on your booking confirmation email) Click on a passenger to add or remove them from a leg of the journey. Click + to add new passengers Click "View details" and then Delete to remove them entirely. Changes are saved automatically. Related articles I've lost my password How do I amend my Advance Passenger Information (API)? Can I supply my API by phone? Do I need to supply passenger details for every booking I make? What happens if I arrive early or late?