undici

Node.js HTTP/1.1 client, written from scratch. The underlying engine for the built-in fetch() in Node.js v18+. Current version 8.x, ESM/CJS dual mode.

Name meaning: Italian for "eleven" — 1.1 → 11 → Eleven → Undici (also a Stranger Things reference)

Trigger Scenarios

Use when the user needs HTTP requests, undici, fetch, proxied requests, or HTTP mocking.

Installation

npm i undici

Performance Hierarchy