curl --request POST \
  --url https://api.linkupapi.com/v2/messages \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <x-api-key>' \
  --data '
{
  "account_id": "<string>",
  "action": "<string>",
  "params": {
    "message_text": "<string>",
    "subject": "<string>",
    "profile_url": "<string>",
    "conversation_id": "<string>",
    "inmail": true,
    "recipient_urn": "<string>",
    "recruiter": true,
    "phone_number": "<string>",
    "effect": "<string>",
    "to": "<string>",
    "html": "<string>",
    "reply_to": "<string>",
    "thread_ref": "<string>",
    "cc": [
      "<string>"
    ],
    "bcc": [
      "<string>"
    ],
    "custom_headers": {},
    "account_ids": [
      "<string>"
    ],
    "media_link": "<string>",
    "media_file": {
      "data": "<string>",
      "filename": "<string>"
    },
    "media_path": "<string>",
    "media_links": [
      "<string>"
    ],
    "media_files": [
      {}
    ],
    "voice_message": true,
    "quoted_message_id": "<string>"
  }
}
'

import requests

url = "https://api.linkupapi.com/v2/messages"

payload = {
    "account_id": "<string>",
    "action": "<string>",
    "params": {
        "message_text": "<string>",
        "subject": "<string>",
        "profile_url": "<string>",
        "conversation_id": "<string>",
        "inmail": True,
        "recipient_urn": "<string>",
        "recruiter": True,
        "phone_number": "<string>",
        "effect": "<string>",
        "to": "<string>",
        "html": "<string>",
        "reply_to": "<string>",
        "thread_ref": "<string>",
        "cc": ["<string>"],
        "bcc": ["<string>"],
        "custom_headers": {},
        "account_ids": ["<string>"],
        "media_link": "<string>",
        "media_file": {
            "data": "<string>",
            "filename": "<string>"
        },
        "media_path": "<string>",
        "media_links": ["<string>"],
        "media_files": [{}],
        "voice_message": True,
        "quoted_message_id": "<string>"
    }
}
headers = {
    "x-api-key": "<x-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': '<x-api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    account_id: '<string>',
    action: '<string>',
    params: {
      message_text: '<string>',
      subject: '<string>',
      profile_url: '<string>',
      conversation_id: '<string>',
      inmail: true,
      recipient_urn: '<string>',
      recruiter: true,
      phone_number: '<string>',
      effect: '<string>',
      to: '<string>',
      html: '<string>',
      reply_to: '<string>',
      thread_ref: '<string>',
      cc: ['<string>'],
      bcc: ['<string>'],
      custom_headers: {},
      account_ids: ['<string>'],
      media_link: '<string>',
      media_file: {data: '<string>', filename: '<string>'},
      media_path: '<string>',
      media_links: ['<string>'],
      media_files: [{}],
      voice_message: true,
      quoted_message_id: '<string>'
    }
  })
};

fetch('https://api.linkupapi.com/v2/messages', 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.linkupapi.com/v2/messages",
  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([
    'account_id' => '<string>',
    'action' => '<string>',
    'params' => [
        'message_text' => '<string>',
        'subject' => '<string>',
        'profile_url' => '<string>',
        'conversation_id' => '<string>',
        'inmail' => true,
        'recipient_urn' => '<string>',
        'recruiter' => true,
        'phone_number' => '<string>',
        'effect' => '<string>',
        'to' => '<string>',
        'html' => '<string>',
        'reply_to' => '<string>',
        'thread_ref' => '<string>',
        'cc' => [
                '<string>'
        ],
        'bcc' => [
                '<string>'
        ],
        'custom_headers' => [
                
        ],
        'account_ids' => [
                '<string>'
        ],
        'media_link' => '<string>',
        'media_file' => [
                'data' => '<string>',
                'filename' => '<string>'
        ],
        'media_path' => '<string>',
        'media_links' => [
                '<string>'
        ],
        'media_files' => [
                [
                                
                ]
        ],
        'voice_message' => true,
        'quoted_message_id' => '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <x-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.linkupapi.com/v2/messages"

	payload := strings.NewReader("{\n  \"account_id\": \"<string>\",\n  \"action\": \"<string>\",\n  \"params\": {\n    \"message_text\": \"<string>\",\n    \"subject\": \"<string>\",\n    \"profile_url\": \"<string>\",\n    \"conversation_id\": \"<string>\",\n    \"inmail\": true,\n    \"recipient_urn\": \"<string>\",\n    \"recruiter\": true,\n    \"phone_number\": \"<string>\",\n    \"effect\": \"<string>\",\n    \"to\": \"<string>\",\n    \"html\": \"<string>\",\n    \"reply_to\": \"<string>\",\n    \"thread_ref\": \"<string>\",\n    \"cc\": [\n      \"<string>\"\n    ],\n    \"bcc\": [\n      \"<string>\"\n    ],\n    \"custom_headers\": {},\n    \"account_ids\": [\n      \"<string>\"\n    ],\n    \"media_link\": \"<string>\",\n    \"media_file\": {\n      \"data\": \"<string>\",\n      \"filename\": \"<string>\"\n    },\n    \"media_path\": \"<string>\",\n    \"media_links\": [\n      \"<string>\"\n    ],\n    \"media_files\": [\n      {}\n    ],\n    \"voice_message\": true,\n    \"quoted_message_id\": \"<string>\"\n  }\n}")

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

	req.Header.Add("x-api-key", "<x-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.linkupapi.com/v2/messages")
  .header("x-api-key", "<x-api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"account_id\": \"<string>\",\n  \"action\": \"<string>\",\n  \"params\": {\n    \"message_text\": \"<string>\",\n    \"subject\": \"<string>\",\n    \"profile_url\": \"<string>\",\n    \"conversation_id\": \"<string>\",\n    \"inmail\": true,\n    \"recipient_urn\": \"<string>\",\n    \"recruiter\": true,\n    \"phone_number\": \"<string>\",\n    \"effect\": \"<string>\",\n    \"to\": \"<string>\",\n    \"html\": \"<string>\",\n    \"reply_to\": \"<string>\",\n    \"thread_ref\": \"<string>\",\n    \"cc\": [\n      \"<string>\"\n    ],\n    \"bcc\": [\n      \"<string>\"\n    ],\n    \"custom_headers\": {},\n    \"account_ids\": [\n      \"<string>\"\n    ],\n    \"media_link\": \"<string>\",\n    \"media_file\": {\n      \"data\": \"<string>\",\n      \"filename\": \"<string>\"\n    },\n    \"media_path\": \"<string>\",\n    \"media_links\": [\n      \"<string>\"\n    ],\n    \"media_files\": [\n      {}\n    ],\n    \"voice_message\": true,\n    \"quoted_message_id\": \"<string>\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.linkupapi.com/v2/messages")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<x-api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"account_id\": \"<string>\",\n  \"action\": \"<string>\",\n  \"params\": {\n    \"message_text\": \"<string>\",\n    \"subject\": \"<string>\",\n    \"profile_url\": \"<string>\",\n    \"conversation_id\": \"<string>\",\n    \"inmail\": true,\n    \"recipient_urn\": \"<string>\",\n    \"recruiter\": true,\n    \"phone_number\": \"<string>\",\n    \"effect\": \"<string>\",\n    \"to\": \"<string>\",\n    \"html\": \"<string>\",\n    \"reply_to\": \"<string>\",\n    \"thread_ref\": \"<string>\",\n    \"cc\": [\n      \"<string>\"\n    ],\n    \"bcc\": [\n      \"<string>\"\n    ],\n    \"custom_headers\": {},\n    \"account_ids\": [\n      \"<string>\"\n    ],\n    \"media_link\": \"<string>\",\n    \"media_file\": {\n      \"data\": \"<string>\",\n      \"filename\": \"<string>\"\n    },\n    \"media_path\": \"<string>\",\n    \"media_links\": [\n      \"<string>\"\n    ],\n    \"media_files\": [\n      {}\n    ],\n    \"voice_message\": true,\n    \"quoted_message_id\": \"<string>\"\n  }\n}"

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