Template API Oficial

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.robomensageiro.com.br/api/messages/sendOfficial',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'{
    "number": "5511989091838",
    "name": "vars_001", // nome da template
    "language": "pt_BR"
}',
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json',
    'Authorization: Bearer seutoken'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.robomensageiro.com.br/api/messages/sendOfficial',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'{
    "number": "5511989091838",
    "name": "vars_001", // nome da template
    "language": "pt_BR",
    "template": [
        {
            "type": "text",
            "text": "valor 1" // valor variavel 1
        },
        {
            "type": "text",
            "text": "Valor 2" // valor variavel 2
        },
        {
            "type": "text",
            "text": "Valor 3" // valor variavel 3
        }
    ]
}',
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json',
    'Authorization: Bearer seutoken'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;

<?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => 'https://api.robomensageiro.com.br/api/messages/sendOfficialCustom',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'{
    "number": "5511989091838",
    "name": "vars_001",
    "language": "pt_BR",
    "template": [
                    {
                        "type": "header",
                        "parameters": [{
                                "type": "image",
                                "image": {
                                    "link": "https://seusite.com.br/nome-da-imagem.png"
                                }
                            }
                        ]
                    }, {
                        "type": "button",
                        "sub_type": "quick_reply",
                        "index": "0",
                        "parameters": [{
                                "type": "payload",
                                "payload": "Descadastrar"
                            }
                        ]
                    }, {
                        "type": "button",
                        "sub_type": "quick_reply",
                        "index": "1",
                        "parameters": [{
                                "type": "payload",
                                "payload": "Alterar Contato"
                            }
                        ]
                    }
                ]
}',
  CURLOPT_HTTPHEADER => array(
    'Content-Type: application/json',
    'Authorization: Bearer seutoken'
  ),
));

$response = curl_exec($curl);

curl_close($curl);
echo $response;