I Built an Agent to Run Live Event Raffles (then tried to rig it)

I just came back from a great RSAC 2026. I work at Keycard , and at our expo booth, attendees could enter a raffle to win a Flipper 0 or a Mac Mini. At events like RSAC, you'd typically earn your raffle entry by offering up a badge scan, or by listening to a sales pitch. I wanted to do things a little differently, so I built an agent that uses Keycard and a purpose-built MCP server to conduct raffles. Booth visitors received a short live demo simply by entering the raffle itself. The Lockbox raffle agent is a demo that has real stakes dependent on Keycard functionality . The Lockbox conducts a live raffle, processing actual attendee information with an AI agent governed by real policy, with zero standing access. Booth staff log in with their Keycard email, then record raffle entries, draw winners, and manage events using natural language. The UI shows a lockbox visual next to the chat. This lockbox is a metaphor for how Keycard works. The box itself represents the state of agent access