About Our Developer Documentation

HighLevel is currently in the process of moving to an OAuth 2.0-based API (API 2.0), and at some point in the future, this will be the only API available for integration once this migration is complete. Until this time, we have two APIs, which we are calling the API 1.0 and the API 2.0 for added clarity when referencing which API you are utilizing. See further details below.