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Crul Build Status

Crul is a curl replacement, that is, it's a command line HTTP client. It has fewer features and options, but it aims to be more user friendly. It's heavily inspired by httpie.

It's written in the Crystal language. It's in an early stage but it allows already basic usage.


  • Fast
  • No dependencies, easy to install
  • Basic HTTP features (method, request body, headers)
  • Syntax highlighting of the output (JSON and XML)
  • Basic authentication
  • Cookie store
  • Bash completion of commands and options

Planned features

  • User friendly headers and request body generation (similar to httpie's)
  • Digest authentication
  • More fancy stuff



brew tap porras/crul
brew install crul

Or, if you want to install the latest, unreleased version:

brew tap porras/tap
brew install crul --HEAD



There is an APT repository with signed packages of the latest crul version. To setup this repo and install crul, run the following commands (as root or with sudo):

apt-key adv --keyserver --recv-keys ED2715FE
echo "deb packages main" > /etc/apt/sources.list.d/
apt-get update
apt-get install crul

Other distributions

See how to install from source below.

From source

If there are no binary packages for your OS version, you can install crul downloading the zip or tarball and building it from source. See Development for instructions.


After installation, add this line to your .bashrc (only Bash supported at this moment):

eval "$(crul --completion)"

You don't need this if you installed via Homebrew (it's automatic).


Usage: crul [method] URL [options]

HTTP methods (default: GET):
    get, GET                         Use GET
    post, POST                       Use POST
    put, PUT                         Use PUT
    delete, DELETE                   Use DELETE

HTTP options:
    -d DATA, --data DATA             Request body
    -d @file, --data @file           Request body (read from file)
    -H HEADER, --header HEADER       Set header
    -a USER:PASS, --auth USER:PASS   Basic auth
    -c FILE, --cookies FILE          Use FILE as cookie store (reads and writes)

Response formats (default: autodetect):
    -j, --json                       Format response as JSON
    -x, --xml                        Format response as XML
    -p, --plain                      Format response as plain text

Other options:
    -h, --help                       Show this help
    -V, --version                    Display version


GET request

$ crul
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 11 Mar 2015 07:57:33 GMT
Content-type: application/json
Content-length: 179
Connection: keep-alive
Access-control-allow-origin: *
Access-control-allow-credentials: true

  "args": {
    "a": "b"
  "headers": {
    "Content-Length": "0",
    "Host": ""
  "origin": "",
  "url": ""

PUT request

$ crul put -d '{"a":"b"}' -H Content-Type:application/json
HTTP/1.1 200 OK
Server: nginx
Date: Wed, 11 Mar 2015 07:58:54 GMT
Content-type: application/json
Content-length: 290
Connection: keep-alive
Access-control-allow-origin: *
Access-control-allow-credentials: true

  "args": {},
  "data": "{\"a\":\"b\"}",
  "files": {},
  "form": {},
  "headers": {
    "Content-Length": "9",
    "Content-Type": "application/json",
    "Host": ""
  "json": {
    "a": "b"
  "origin": "",
  "url": ""


You'll need Crystal 0.33 installed (it might work with older or newer versions, but that's the one that's tested).

After checking out the repo (or decompressing the tarball with the source code), run shards to get the development dependencies, and make to run the tests and compile the source. Optionally, you can run make install to install it (as a default, in /usr/local/bin, override it running PREFIX=/opt/whatever make install).


  1. Fork it ( )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

You can also contribute by trying it and reporting any issue you find.


Copyright (c) 2015-2016 Sergio Gil. See LICENSE for details.

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crystal (180