AI Security Hackathon is a one-day, in-person San Francisco startup and technology event for builders interested in agentic AI and security. Scheduled for September 11, 2026, in the Marina District, the free hackathon invites participants to create agentic projects while addressing security considerations. The event offers a practical environment for developers, founders, and AI enthusiasts to prototype, collaborate, and compete for $1,750 in prizes. It is especially relevant to teams exploring secure AI agents, responsible deployment, and emerging infrastructure for AI-powered products.