When interfacing with your CDN Zones via the CDN API, it's essential to be familiar with the permissible values for the 'CACHE_EXP (Cache Expiration Time)' setting. Below are the accepted values:

• -1: Respect Origin Cache-Control (Default)
• 0: Do Not Cache
• 180: 3 Minutes
• 1200: 20 Minutes
• 3600: 1 Hour
• 10800: 3 Hours
• 43200: 12 Hours
• 86400: 1 Day
• 259200: 3 Days
• 604800: 1 Week
• 2592000: 1 Month
• 7776000: 3 Months
• 31919000: 1 Year