Postgres connections now work through Sandbox firewall

Vercel has updated its Sandbox firewall to support PostgreSQL database connections, enabling developers to connect to Postgres databases from within Vercel's sandboxed environment. This enhancement improves the functionality of serverless functions and edge computing by removing previous firewall restrictions that blocked outbound database connections. The update allows for more seamless integration of Postgres databases with Vercel-hosted applications.

Source: Vercel Blog | 2026-05-01