# Vercel Bun runtime for Vercel Functions now accepts Bun.serve as an entrypoint

- Product: Vercel (https://whatsnew.fyi/product/vercel)
- Vendor: Vercel
- Date: 2026-08-10
- Original notes: https://vercel.com/changelog/bun-serve-entrypoint-for-vercel-functions
- Permalink: https://whatsnew.fyi/product/vercel/releases/feed-https-vercel.com-changelog-bun-serve-entrypoint-for-ver

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Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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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 fram…

- **added** — Bun runtime for Vercel Functions now accepts Bun.serve as a function entrypoint
- **added** — Support for WebSocket handlers in Bun.serve entrypoints