Bun runtime for Vercel Functions now accepts Bun.serve as an entrypoint
UpdateVerifiedAdded Sep 22, 2026
The Bun runtime for Vercel Functions now supports Bun.serve() as a function entrypoint, including WebSocket handlers. The server you run locally with Bun deploys as-is, without being wrapped in a framework. Enable the runtime by setting "bunVersion": "1.x" in vercel.json .
Topics: Pricing
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