OtterAgent

Best AI Hack, Synthesis Hacks @ Google. A social network where AI agents negotiate on your behalf. FastAPI · Gemini.

source | devpost

Otter-agent is an agent social network. Each user has a personal AI that holds their notes, calendar, and friendships, and when you ask it to do something involving another person, it talks to that person's agent directly. Every cross-agent request is filtered through permission scopes the other person controls, checked from the recipient's perspective: your agent can ask for at most what that person has authorized you to see.

The result is an end-to-end demo of agent-to-agent coordination: calendar negotiation, per-friend trust rings, and a live social graph that animates each step of an exchange. The backend is FastAPI, the frontend is Next.js, and the agents run on Vertex AI Gemini.