curl --request POST \
  --url https://api.ck-itsolutions.nl/v1/flowrule \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "dst": false,
  "protocol": "<string>",
  "rate": {
    "mbit": 0,
    "kpps": 0
  },
  "layer4": false,
  "port": {
    "match": false,
    "src": {
      "start": 0,
      "end": 0
    },
    "dst": {
      "start": 0,
      "end": 0
    }
  },
  "packetlength": {
    "start": 0,
    "end": 0
  },
  "threshold": {
    "set": false,
    "mbit": 0,
    "kpps": 0
  },
  "layer7": false,
  "priority": 123
}
'

import requests

url = "https://api.ck-itsolutions.nl/v1/flowrule"

payload = {
    "dst": False,
    "protocol": "<string>",
    "rate": {
        "mbit": 0,
        "kpps": 0
    },
    "layer4": False,
    "port": {
        "match": False,
        "src": {
            "start": 0,
            "end": 0
        },
        "dst": {
            "start": 0,
            "end": 0
        }
    },
    "packetlength": {
        "start": 0,
        "end": 0
    },
    "threshold": {
        "set": False,
        "mbit": 0,
        "kpps": 0
    },
    "layer7": False,
    "priority": 123
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    dst: false,
    protocol: '<string>',
    rate: {mbit: 0, kpps: 0},
    layer4: false,
    port: {match: false, src: {start: 0, end: 0}, dst: {start: 0, end: 0}},
    packetlength: {start: 0, end: 0},
    threshold: {set: false, mbit: 0, kpps: 0},
    layer7: false,
    priority: 123
  })
};

fetch('https://api.ck-itsolutions.nl/v1/flowrule', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.ck-itsolutions.nl/v1/flowrule",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'dst' => false,
    'protocol' => '<string>',
    'rate' => [
        'mbit' => 0,
        'kpps' => 0
    ],
    'layer4' => false,
    'port' => [
        'match' => false,
        'src' => [
                'start' => 0,
                'end' => 0
        ],
        'dst' => [
                'start' => 0,
                'end' => 0
        ]
    ],
    'packetlength' => [
        'start' => 0,
        'end' => 0
    ],
    'threshold' => [
        'set' => false,
        'mbit' => 0,
        'kpps' => 0
    ],
    'layer7' => false,
    'priority' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.ck-itsolutions.nl/v1/flowrule"

	payload := strings.NewReader("{\n  \"dst\": false,\n  \"protocol\": \"<string>\",\n  \"rate\": {\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer4\": false,\n  \"port\": {\n    \"match\": false,\n    \"src\": {\n      \"start\": 0,\n      \"end\": 0\n    },\n    \"dst\": {\n      \"start\": 0,\n      \"end\": 0\n    }\n  },\n  \"packetlength\": {\n    \"start\": 0,\n    \"end\": 0\n  },\n  \"threshold\": {\n    \"set\": false,\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer7\": false,\n  \"priority\": 123\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.ck-itsolutions.nl/v1/flowrule")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"dst\": false,\n  \"protocol\": \"<string>\",\n  \"rate\": {\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer4\": false,\n  \"port\": {\n    \"match\": false,\n    \"src\": {\n      \"start\": 0,\n      \"end\": 0\n    },\n    \"dst\": {\n      \"start\": 0,\n      \"end\": 0\n    }\n  },\n  \"packetlength\": {\n    \"start\": 0,\n    \"end\": 0\n  },\n  \"threshold\": {\n    \"set\": false,\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer7\": false,\n  \"priority\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.ck-itsolutions.nl/v1/flowrule")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"dst\": false,\n  \"protocol\": \"<string>\",\n  \"rate\": {\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer4\": false,\n  \"port\": {\n    \"match\": false,\n    \"src\": {\n      \"start\": 0,\n      \"end\": 0\n    },\n    \"dst\": {\n      \"start\": 0,\n      \"end\": 0\n    }\n  },\n  \"packetlength\": {\n    \"start\": 0,\n    \"end\": 0\n  },\n  \"threshold\": {\n    \"set\": false,\n    \"mbit\": 0,\n    \"kpps\": 0\n  },\n  \"layer7\": false,\n  \"priority\": 123\n}"

response = http.request(request)
puts response.read_body

{}

{
  "message": "<string>"
}