curl --request POST \
  --url https://api.wppfy.com/group/join \
  --header 'Content-Type: application/json' \
  --header 'token: <api-key>' \
  --data '
{
  "invitecode": "https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7"
}
'

import requests

url = "https://api.wppfy.com/group/join"

payload = { "invitecode": "https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7" }
headers = {
    "token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {token: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({invitecode: 'https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7'})
};

fetch('https://api.wppfy.com/group/join', 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.wppfy.com/group/join",
  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([
    'invitecode' => 'https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "token: <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.wppfy.com/group/join"

	payload := strings.NewReader("{\n  \"invitecode\": \"https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7\"\n}")

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

	req.Header.Add("token", "<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.wppfy.com/group/join")
  .header("token", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"invitecode\": \"https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.wppfy.com/group/join")

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

request = Net::HTTP::Post.new(url)
request["token"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"invitecode\": \"https://chat.whatsapp.com/IYnl5Zg9bUcJD32rJrDzO7\"\n}"

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

{
  "response": "Ingreso al grupo realizado con éxito",
  "group": {
    "JID": "jid8@g.us",
    "OwnerJID": "1232@s.whatsapp.net",
    "OwnerPN": "<string>",
    "Name": "Grupo de Soporte",
    "NameSetAt": "2023-11-07T05:31:56Z",
    "NameSetBy": "<string>",
    "NameSetByPN": "<string>",
    "Topic": "<string>",
    "TopicID": "<string>",
    "TopicSetAt": "2023-11-07T05:31:56Z",
    "TopicSetBy": "<string>",
    "TopicSetByPN": "<string>",
    "TopicDeleted": true,
    "IsLocked": true,
    "IsAnnounce": true,
    "AnnounceVersionID": "<string>",
    "IsEphemeral": true,
    "DisappearingTimer": 1,
    "IsIncognito": true,
    "IsParent": true,
    "IsJoinApprovalRequired": true,
    "LinkedParentJID": "<string>",
    "IsDefaultSubGroup": true,
    "DefaultMembershipApprovalMode": "<string>",
    "GroupCreated": "2023-11-07T05:31:56Z",
    "CreatorCountryCode": "<string>",
    "ParticipantVersionID": "<string>",
    "Participants": [
      {
        "JID": "<string>",
        "LID": "<string>",
        "PhoneNumber": "<string>",
        "IsAdmin": true,
        "IsSuperAdmin": true,
        "DisplayName": "<string>",
        "ImagePreview": "<string>",
        "Error": 1,
        "AddRequest": {
          "Code": "<string>",
          "Expiration": "2023-11-07T05:31:56Z"
        },
        "Username": "<string>"
      }
    ],
    "MemberAddMode": "",
    "AddressingMode": "",
    "OwnerCanSendMessage": true,
    "OwnerIsAdmin": true,
    "DefaultSubGroupId": "<string>",
    "invite_link": "<string>",
    "request_participants": "<string>",
    "image_url": "<string>",
    "image_preview_url": "<string>",
    "picture_id": "<string>",
    "picture_preview_id": "<string>",
    "picture_empty_at": "2023-11-07T05:31:56Z",
    "image_checked_at": "2023-11-07T05:31:56Z",
    "image_preview_checked_at": "2023-11-07T05:31:56Z",
    "parent_community": {
      "jid": "<string>",
      "name": "<string>",
      "image_url": "<string>",
      "image_preview_url": "<string>",
      "default_subgroup_jid": "<string>"
    },
    "participant_profiles": [
      {
        "jid": "<string>",
        "pn": "<string>",
        "lid": "<string>",
        "username": "<string>",
        "display_name": "<string>",
        "name": "<string>",
        "image_url": "<string>",
        "image_preview_url": "<string>",
        "picture_id": "<string>",
        "picture_preview_id": "<string>",
        "is_admin": true,
        "is_super_admin": true
      }
    ],
    "ParticipantCount": 1,
    "request_participants_lid": "<string>"
  },
  "needs_refresh": false
}

{
  "error": "invalid invite code"
}

{
  "error": "error joining group"
}