At Load Bearing Empire, we just shipped a production voice command center handling 8 concurrent AI agents across real estate, demolition, and logistics operations—all orchestrated through Supabase Edge Functions and VAPI webhooks. This article breaks down the technical stack we deployed to Vercel: a 5-page frontend managing 8 specialized voice agents, 8 distinct automation workflows, and an 8-table Postgres schema that routes customer interactions to the right agent (property valuation, demo scheduling, valet trash requests, credit repair intake, mineral rights deals, structural calculations, capital sourcing, and emergency dispatch). If you're building multi-agent systems without a dedicated backend team, using Supabase for webhook handling and Postgres as your agent state machine is a practical, cost-effective approach—here's exactly how we wired it.