Alpaca sees 4x surge in API users as AI agents reshape trading infrastructure

When Alpaca CEO Yoshi Yokokawa talks about AI agents trading stocks, he’s not pitching some distant future. He’s describing what’s already happening on his platform right now. Monthly active API users on Alpaca’s trading infrastructure have grown nearly 4x over the past six months. The numbers behind the agent boom The acceleration started becoming visible in Q1 2026, when Alpaca’s API usage surged nearly 4x quarter-over-quarter. Monthly growth rates jumped from single digits in Q4 2025 to approximately 30% in early 2026. The catalyst? AI agents. Alpaca has been building the tools to make this possible. The company launched and enhanced several AI-native products, including a Trading MCP Server, a command-line interface, and an open-source Skills Library. The platform now powers hundreds of clients across more than 40 countries, supporting over 10 million brokerage accounts. Alpaca manages tokenized equities totaling $1.5B in Assets Under Custody. Fresh capital for an agent-first future On July 16, 2026, Alpaca closed a $135 million equity raise led by Peak XV, bringing its total financing to $435 million. The round values the company at approximately $1.15B. This latest raise foll...