library · inferred from evidence
undici
The runtime's native fetch implementation used as a replacement for node-fetch@2 to correctly decode Brotli responses.
- Vercel: fetch from serverless function fails with "UND_ERR_CONNECT_TIMEOUT" on Node 20
The failures come from a buggy undici (6.19) bundled inside Node 20's fetch, not from Vercel's network. Confirmed workarounds: 1) downgrade the Vercel project to Node 18.x (multiple reporters confirmed this fixed it; Vercel only allows majo