Httpie

GET

#!/bin/bash

if
  http
    --check-status
    --ignore-stdin
    --timeout=10
    --raw "{\"options\": { \"method\": \"GET\",\"headers\": {\"Content-Type\": \"application/json\",\"Accept\": \"application/json\"}}, \"url\": \"/rest/api/3/issue/DEV-16\"}"
    POST <YOUR ENDPOINT URL> \apikey:"< YOURTOKEN >" ; then
      echo 'OK!'
else
    case $? in
        2) echo 'Request timed out!' ;;
        3) echo 'Unexpected HTTP 3xx Redirection!' ;;
        4) echo 'HTTP 4xx Client Error!' ;;
        5) echo 'HTTP 5xx Server Error!' ;;
        6) echo 'Exceeded --max-redirects=<n> redirects!' ;;
        *) echo 'Other Error!' ;;
    esac
fi

POST

#!/bin/bash

if
  http
    --check-status
    --ignore-stdin
    --timeout=10
    --raw "{
      \"options\": {
         \"method\": \"POST\",
         \"headers\": {
          \"Content-Type\": \"application/json\",
          \"Accept\": \"application/json\"
        },
        \"body\": {
          \"fields\": {
            \"project\":{
              \"name\": \"<your project name>\"
            },
            \"summary\": \"Create Issue via POST.\",
            \"description\": \"Creating of an issue via a POST request using the API Key Manager\",
            \"issuetype\": {
              \"id\": \"<your issue type id>\"
            }
          }
        }
      },
      \"url\": \"/rest/api/2/issue\"
    }"
    POST <YOUR ENDPOINT URL> \apikey:"< YOURTOKEN >" ; then
      echo 'OK!'
else
    case $? in
        2) echo 'Request timed out!' ;;
        3) echo 'Unexpected HTTP 3xx Redirection!' ;;
        4) echo 'HTTP 4xx Client Error!' ;;
        5) echo 'HTTP 5xx Server Error!' ;;
        6) echo 'Exceeded --max-redirects=<n> redirects!' ;;
        *) echo 'Other Error!' ;;
    esac
fi