The API Surface Is the New Product. Revolut Just Proved It

Two engineers at Revolut X built a working trading system in 30 minutes. Not a prototype. A functional market-making operation handling inventory, quoting, position sizing, execution, and alerts. The tool was Claude. The method was MCP. The implication is that traditional feature roadmaps might be obsolete. Nikita Ivanov and Vlad Kaminski connected Claude to Revolut's exchange API through Anthropic's Model Context Protocol. Leonid Bashlykov, Revolut's Head of Crypto Product, prompted it in plain English. The agent did the rest. What MCP Actually Changed Before MCP, every AI integration was bespoke. You wrote a connector for OpenAI, another for Claude, another for your internal tools. Each one required maintenance, documentation, and debugging. MCP is an open protocol that standardizes how AI models discover and use external tools. You expose your API through an MCP server once. Any compatible agent can use it. Revolut built one server. Claude figured out the rest. The shift is subtle b