The quoted terms/pricing are only going to be eligible for purchase until their expiration date.

On new business, no prior effective date, the expiration date will expire 60 days from the original quote date. If there is a prior effective date, the expiration date will be 7 days after the effective date.

On the API, this value is provided in the "quote_expiration_date" field of the Quote Entity in the quote webhook results.

The data type is a string in the format "yyyy-MM-dd", for example "2023-03-30".