curl --request POST \
  --url http://localhost:3917/effect/apply \
  --header 'Content-Type: application/json' \
  --data '
{
  "duration": 4,
  "entity_id": 5,
  "modifiers": [
    "move_speed:multiply:0.5"
  ],
  "source": 3,
  "stack_policy": "stack:3",
  "tag": "poison",
  "tick_effect": "dps:10"
}
'

import requests

url = "http://localhost:3917/effect/apply"

payload = {
    "duration": 4,
    "entity_id": 5,
    "modifiers": ["move_speed:multiply:0.5"],
    "source": 3,
    "stack_policy": "stack:3",
    "tag": "poison",
    "tick_effect": "dps:10"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    duration: 4,
    entity_id: 5,
    modifiers: ['move_speed:multiply:0.5'],
    source: 3,
    stack_policy: 'stack:3',
    tag: 'poison',
    tick_effect: 'dps:10'
  })
};

fetch('http://localhost:3917/effect/apply', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_PORT => "3917",
  CURLOPT_URL => "http://localhost:3917/effect/apply",
  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([
    'duration' => 4,
    'entity_id' => 5,
    'modifiers' => [
        'move_speed:multiply:0.5'
    ],
    'source' => 3,
    'stack_policy' => 'stack:3',
    'tag' => 'poison',
    'tick_effect' => 'dps:10'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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 := "http://localhost:3917/effect/apply"

	payload := strings.NewReader("{\n  \"duration\": 4,\n  \"entity_id\": 5,\n  \"modifiers\": [\n    \"move_speed:multiply:0.5\"\n  ],\n  \"source\": 3,\n  \"stack_policy\": \"stack:3\",\n  \"tag\": \"poison\",\n  \"tick_effect\": \"dps:10\"\n}")

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

	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("http://localhost:3917/effect/apply")
  .header("Content-Type", "application/json")
  .body("{\n  \"duration\": 4,\n  \"entity_id\": 5,\n  \"modifiers\": [\n    \"move_speed:multiply:0.5\"\n  ],\n  \"source\": 3,\n  \"stack_policy\": \"stack:3\",\n  \"tag\": \"poison\",\n  \"tick_effect\": \"dps:10\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("http://localhost:3917/effect/apply")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"duration\": 4,\n  \"entity_id\": 5,\n  \"modifiers\": [\n    \"move_speed:multiply:0.5\"\n  ],\n  \"source\": 3,\n  \"stack_policy\": \"stack:3\",\n  \"tag\": \"poison\",\n  \"tick_effect\": \"dps:10\"\n}"

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

{
  "message": "Applied effect 'poison' to entity 5 for 4s",
  "ok": true
}