Koa
Expressive middleware for node.js using ES2017 async functions observed · 2026-08-28
Health v2 · maintenance only
94/100
- Activity 99
- Release rhythm 84
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 14
- age_days: 4792
- days_rel: 104
- days_push: 7
- n_releases_24m: 16
Adoption not part of the score
35689 stars · 3227 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Koa is an expressive HTTP middleware framework for Node.js built by the Express team, using async functions for cascading middleware. It has a small core (~570 SLOC) with no bundled middleware, providing content negotiation, redirection, and other common HTTP server helpers.
Use cases
- build web apis in node.js
- write http servers with async middleware
- create minimal node.js web applications
- replace express with a lighter framework
- handle content negotiation and redirection in node
When to choose
- you need a batteries-included framework with routing and middleware built in
- you want a large ecosystem of prebuilt plugins out of the box
When to avoid
- you need a full-stack framework with built-in routing, validation, and auth
- you are not using node.js
- you rely on koa v1 generator middleware
Facets
framework · maturity stable
web-framework http-server middleware routing web-development backend apis async expressive minimal http javascript nodejs web-server
2 sources
- readme: https://github.com/koajs/koa · fetched 2026-08-28 · 63df3e12ceb3
- homepage: https://koajs.com · fetched 2026-08-29 · bbea983eefb1
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| koajs/koa | main | 94 |
| koajs/examples | examples | 48 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem