Add a travel insurance or disruption protection product at checkout via a partner insurance API

Steps

1. At the checkout stage of a flight or trip booking, call the insurance partner's quote endpoint with trip details: departure date, return date, destination, total trip cost, and passenger ages
2. Parse the quote response to retrieve available plan options (e.g., cancellation-only, comprehensive, disruption add-on) with premium amounts and coverage limits per plan
3. Present the insurance options to the user with plain-language summaries of covered events, exclusions, and the claim process; do not present only the cheapest option without surfacing coverage differences
4. On user selection, call the policy purchase endpoint with the quote ID, passenger details, and payment; receive the policy number and certificate download URL
5. Store the policy number alongside the trip booking record; surface the certificate and insurer contact number in the trip confirmation sent to the traveler