To date, the United States has been slow to create an official, standard framework for open banking APIs. However, new standards through the establishment of the Financial Data Exchange will help facilitate international collaboration and innovation. The board of FDX is composed of major financial institutions and fintechs including Bank of America, Capital One, Charles Schwab, Citigroup, JPMorgan, and others.
Source: How FDX standards are paving the way for open banking in North America