This document summarizes a presentation on developing an interoperability maturity toolkit for health information systems. The toolkit includes a maturity model and assessment tool to help stakeholders evaluate their current status and develop plans to improve interoperability. The model has domains like leadership, technology, and data ethics, with levels describing a progression from basic to optimized capabilities. A collaborative process involved stakeholders from Ghana and Kenya to create the toolkit, which aims to promote standardized, secure data sharing and better health outcomes through cooperation. Next steps involve piloting the toolkit and developing additional components to make it a global public good.