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Prices in this command’s output are integers in minor units. Money objects carry decimal_places — divide by 10 ** decimal_places to display ({ "value": 15977, "decimal_places": 2 } is 159.77, not 15,977). See Money & prices.
Watch a specific route and date pair over time so an agent can act when the fare drops. Use it for prompts like “alert me when Paris to New York for June 17 to 26 goes under €400”. Each response includes the current cheapest cached fare and an offer token you can pass to flight_search when the user decides to book. Cache-only; never triggers a live call.

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Examples