A business requirement is a statement that describes a business need or problem that must be addressed by the project. It should be stated in terms of what the business wants to achieve or improve, not how it will be done.
The requirement in the question states a solution (an API) rather than a business need (synchronizing name and address data). It should be revised to focus on the business need and avoid specifying a solution. References: = PMI Professional in Business Analysis (PMI-PBA)Examination Content Outline (2019), page 7; Business Analysis for Practitioners: A Practice Guide (2015), page 35.