On 8 July 2022, the Bank for International Settlements published a report to the G20 that aims to help payment system operators and authorities understand and evaluate the benefits, challenges and risks of interlinking arrangements. In doing so, it also provides an overview of important trends in interlinking arrangements and application programming interface (API) adoption by payment systems, drawing on recent surveys from the Committee on Payments and Market Infrastructures. The report also provides payment system operators and authorities that are considering interlinking initiatives with some practical perspectives and considerations that they could reflect in their analysis of potential interlinking arrangements.