API Unlock Code (ex: 4A12345) - Used by internal developers and clients to create custom solutions using purchased API access.

API Serial Number (ex: 1111-2222-3333-4444-5555) - Used only by 3rd party developers (Blackbaud Technology Partners and Blackbaud Solution Providers) to provide Blackbaud clients with custom solutions using free API access.

Please review the following article for frequently asked question on the API serial number:

FAQs on the API serial number for Blackbaud Technology Partners and Solution Providers