An example showing the carc.in API

carc.rb

# frozen_string_literal: true

##
# curl --request POST \
#   --header "Accept: application/json" \
#   --header "Content-Type: application/json" \
#   --data "{\"run_request\":{\"language\":\"ruby\",\"version\":\"2.7.0\",\"code\":\"p 2 + 2\"}}" \
#   https://carc.in/run_requests

require 'net/http'
require 'uri'
require 'json'

URL = URI.parse 'https://carc.in/run_requests'
POST = Net::HTTP::Post.new URL
CONTENT_TYPE = 'application/json'
POST.content_type = CONTENT_TYPE
POST['Accept'] = CONTENT_TYPE

BODY = {
  run_request: {
    language: 'ruby',
    version: '2.7.0',
    code: 'p 2 + 2'
  }
}.to_json
POST.body = BODY

RESPONSE = Net::HTTP.start URL.hostname, URL.port, use_ssl: true do |http|
  http.request POST
end

RESPONSE.code
#=> 200

PAYLOAD = JSON.parse RESPONSE.body, symbolize_names: true
p eval PAYLOAD.dig :run_request, :run, :stdout
#>> 4