http4s/http4s

A minimal, idiomatic Scala interface for HTTP

akka/akka-http

The Streaming-first HTTP server/module of Akka

softwaremill/tapir

Declarative, type-safe web endpoints library

zio/zio-http

A scala library to write Http apps.

spinoco/fs2-http

Http Server and client using fs2

lolgab/snunit

Scala Native HTTP server based on NGINX Unit

ollls/zio-tls-http

100% non-blocking, Java NIO only( inspired by zio-nio) , JSON HTTP server based on Scala ZIO library. Everything including TLS encryption modeled as ZIO effects, convenient route DSL similar to https4s, up to 30K TPS local JSON transaction with 25 threads on 6 cores(i7) with ZIO fibers.

softwaremill/livestub

The HTTP server stub you always wanted!

line/armeria

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.

sungiant/zenith

:zap: Functional Scala HTTP server, client, and toolkit.

analogweb/analogweb-scala

Tiny High Performance HTTP Server for Scala

fntz/omhs

One More Http Server: Routing DSL on Netty.

losizm/scamper

The HTTP library for Scala