APIs Are the New Product Interface—Agents Don't Care About UX

Revolut's successful trading system built with Claude demonstrates that AI agents orchestrate complex operations directly through APIs, eliminating the need for human-centric UI design. This shift moves competitive advantage from interface design to API richness and execution quality, with profound implications for fintech and regulated industries. As agents become capable of discovering and composing API capabilities autonomously, traditional feature roadmaps become obsolete.