Ruby

GET

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

uri = URI.parse("<YOUR ENDPOINT URL>")

header = {"apiKey": "<YOURTOKEN>"}
body = {
"options": {
  "method": "GET",
  "headers": {
    "Content-Type": "application/json",
    "Accept": "application/json"
  }
  },
  "url": "/rest/api/3/issue/TEST-1"
}

# Create the HTTP objects

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Post.new(uri.request_uri, header)
request.body = body.to_json

# Send the request

response = http.request(request)

puts response.body

POST

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

uri = URI.parse("<YOUR ENDPOINT URL>")

header = {"apiKey": "<YOURTOKEN>"}
body = {
  "options": {
    "method": "POST",
    "headers": {
      "Content-Type": "application/json",
      "Accept": "application/json"
    },
    "body": {
      "fields": {
        "project":{
          #or you can use "id": "<your project id>"
          "name": "<your project name>"
        },
        "summary": "Create Issue via POST.",
        "description": "Creating of an issue via a POST request using the API Key Manager",
        "issuetype": {
          #or you can use "name": "<your issue type name>"
          "id": "<your issue type id>"
        }
      }
    }
  },
  "url": "/rest/api/2/issue"
}

# Create the HTTP objects

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Post.new(uri.request_uri, header)
request.body = body.to_json

# Send the request

response = http.request(request)

puts response.body