WhatsApp oficial, sem a complexidade da Meta.

curl -X POST https://SEU-DOMINIO/v1/messages \
  -H "Authorization: Bearer chq_live_…" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "from": "pn_01J…",
    "to": "+5511900000000",
    "type": "template",
    "template": {
      "name": "pedido_enviado",
      "language": "pt_BR",
      "variables": ["Ana", "#1234"]
    }
  }'

# PowerShell 5.1+ (Windows) ou 7+ (Linux e macOS)
$body = @'
{
  "from": "pn_01J…",
  "to": "+5511900000000",
  "type": "template",
  "template": {
    "name": "pedido_enviado",
    "language": "pt_BR",
    "variables": ["Ana", "#1234"]
  }
}
'@

$response = Invoke-RestMethod -Method Post -Uri 'https://SEU-DOMINIO/v1/messages' `
  -Headers @{
    'Authorization'   = 'Bearer chq_live_…'
    'Idempotency-Key' = [guid]::NewGuid().ToString()
  } `
  -ContentType 'application/json; charset=utf-8' `
  -Body ([System.Text.Encoding]::UTF8.GetBytes($body))
$response | ConvertTo-Json -Depth 10

// Node.js 18+ (fetch nativo), como módulo ES (.mjs)
import { randomUUID } from 'node:crypto';

const response = await fetch('https://SEU-DOMINIO/v1/messages', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer chq_live_…',
    'Content-Type': 'application/json',
    'Idempotency-Key': randomUUID(),
  },
  body: JSON.stringify({
    from: 'pn_01J…',
    to: '+5511900000000',
    type: 'template',
    template: {
      name: 'pedido_enviado',
      language: 'pt_BR',
      variables: ['Ana', '#1234'],
    },
  }),
});
console.log(response.status, await response.json());

# Python 3.8+ · pip install requests
import uuid

import requests

response = requests.post(
    "https://SEU-DOMINIO/v1/messages",
    headers={
        "Authorization": "Bearer chq_live_…",
        "Idempotency-Key": str(uuid.uuid4()),
    },
    json={
        "from": "pn_01J…",
        "to": "+5511900000000",
        "type": "template",
        "template": {
            "name": "pedido_enviado",
            "language": "pt_BR",
            "variables": ["Ana", "#1234"],
        },
    },
    timeout=15,
)
print(response.status_code, response.json())

<?php
// PHP 8+ com a extensão curl
$body = [
    'from' => 'pn_01J…',
    'to' => '+5511900000000',
    'type' => 'template',
    'template' => [
        'name' => 'pedido_enviado',
        'language' => 'pt_BR',
        'variables' => ['Ana', '#1234'],
    ],
];

$ch = curl_init('https://SEU-DOMINIO/v1/messages');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer chq_live_…',
        'Content-Type: application/json',
        'Idempotency-Key: ' . bin2hex(random_bytes(16)),
    ],
    CURLOPT_POSTFIELDS => json_encode($body),
    CURLOPT_RETURNTRANSFER => true,
]);
$response = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HTTP_CODE), ' ', $response, PHP_EOL;

// Java 17+
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.UUID;

public class EnviarMensagem {
    public static void main(String[] args) throws Exception {
        String body = """
            {
              "from": "pn_01J…",
              "to": "+5511900000000",
              "type": "template",
              "template": {
                "name": "pedido_enviado",
                "language": "pt_BR",
                "variables": ["Ana", "#1234"]
              }
            }
            """;
        HttpRequest request = HttpRequest.newBuilder(URI.create("https://SEU-DOMINIO/v1/messages"))
            .header("Authorization", "Bearer chq_live_…")
            .header("Content-Type", "application/json")
            .header("Idempotency-Key", UUID.randomUUID().toString())
            .POST(HttpRequest.BodyPublishers.ofString(body))
            .build();
        // HTTP/1.1: alguns proxies não completam o upgrade h2c do cliente padrão.
        HttpClient client = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build();
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
        System.out.println(response.statusCode() + " " + response.body());
    }
}

// .NET 8+ (C# 11), programa de nível superior
using System.Net.Http.Headers;
using System.Text;

var json = """
    {
      "from": "pn_01J…",
      "to": "+5511900000000",
      "type": "template",
      "template": {
        "name": "pedido_enviado",
        "language": "pt_BR",
        "variables": ["Ana", "#1234"]
      }
    }
    """;
using var request = new HttpRequestMessage(HttpMethod.Post, "https://SEU-DOMINIO/v1/messages")
{
    Content = new StringContent(json, Encoding.UTF8, "application/json"),
};
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", "chq_live_…");
request.Headers.Add("Idempotency-Key", Guid.NewGuid().ToString());

using var http = new HttpClient();
var response = await http.SendAsync(request);
Console.WriteLine($"{(int)response.StatusCode} {await response.Content.ReadAsStringAsync()}");