Adapters

Connect undevice to your server application to detect devices from each request's headers.

Available adapters

Adapters are included in undevice and support CDN headers and typed built-in and custom flags.

Adapter	Import	Result
Express	undevice/express	res.locals.undevice
Fastify	undevice/fastify	request.undevice

Other frameworks and SSR

The core API accepts headers directly and works with other frameworks without an adapter. See Core API and SSR for examples using Express and Fastify, Astro, and Fetch handlers, plus guidance on hydration.