pepegar / hammock   0.11.3

Contributors Wanted MIT License Website GitHub

Purely functional HTTP client

Scala versions: 2.13 2.12 2.11 2.10
Scala.js versions: 0.6


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Hammock is yet another HTTP client for Scala. It tries to be typeful, purely functional, and work along other technologies that you're already using such as akka-http, circe, or cats.


Add the following to your build.sbt.

// For Scala 2.10, 2.11, or 2.12
libraryDependencies ++= Seq(
  "com.pepegar" %% "hammock-core" % "0.10.0",
  // Hammock for standard Scala doesn't ship with a standard implementation
  "com.pepegar" %% "hammock-apache-http" % "0.10.0"

// For ScalaJS
libraryDependencies += "com.pepegar" %%% "hammock-core" % "0.10.0"


  1. It's easy to use, has a high level API
  2. It's typeful, tries to represent effects at type level.
  3. It does not force a specific target context. You can run your computations in any type F[_] that has an instance of cats-effect's Sync[F].
  4. It has good documentation.
  5. It's modular


Module name Description Version
hammock-core the core functionality of hammock, using XHR in JS 0.10.0
hammock-circe encode and decode HTTP entities with Circe 0.10.0
hammock-apache-http run your HTTP requests with Apache HTTP commons 0.10.0
hammock-akka-http run your HTTP requests with akka-http 0.10.0
hammock-asynchttpclient run your HTTP requests with AsyncHttpClient 0.10.0

How does Hammock look in action?

import cats.effect.IO
import hammock._
import hammock.marshalling._
import hammock.apache.ApacheInterpreter
import hammock.circe.implicits._

object HttpClient {
  // Using the Apache HTTP commons interpreter
  implicit val interpreter = ApacheInterpreter.instance[IO]

  val response = Hammock
    .request(Method.GET, uri"", Map()) // In the `request` method, you describe your HTTP request

Code of conduct

People are expected to follow the Typelevel Code of Conduct when discussing Hammock on the Github page, Gitter channel, or other venues.