Mercantile Partners with American Express and the American Society of Interior Designers to Launch a Small Business Credit Card for Design Professionals

New ASID program offers a purpose-built business credit card and credit tools for a profession defined by project-based cash flow BOSTON, May 26, 2026 /PRNewswire/ -- Mercantile, a financial services platform and division of Onboard Partners, focused on expanding responsible access to credit for small and professional service businesses, today announced a partnership with the American Society of Interior Designers (ASID) to bring purpose-built credit solutions to design professionals nationwide. The new ASID American Express® Business Card will be issued by Celtic Bank and run on the American Express Network — providing ASID members and partners access to Amex Network benefits, offerings, and protections.