You can have up to 5 Free Buckets at any given time each with a 14-day trial. During this trial, you have free access to all Bucket Add-ons including Webhooks, Localization, Revision History and more.
At any point during of your 14-day trial you can upgrade your Bucket, use the Free Bucket Referral Program to extend your Free Bucket free trial time, or earn a Free Bucket forever by contributing to the Cosmic JS community.