curl --request POST \
  --url https://cloud.datafyapi.com.br/v1/{phone_number_id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "messaging_product": "whatsapp",
  "recipient_type": "individual",
  "to": "5511999999999",
  "type": "document",
  "document": {
    "link": "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf",
    "filename": "boleto-pedido-7539.pdf",
    "caption": "Segue o boleto do seu pedido."
  }
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    messaging_product: 'whatsapp',
    recipient_type: 'individual',
    to: '5511999999999',
    type: 'document',
    document: {
      link: 'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
      filename: 'boleto-pedido-7539.pdf',
      caption: 'Segue o boleto do seu pedido.'
    }
  })
};

fetch('https://cloud.datafyapi.com.br/v1/{phone_number_id}/messages', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://cloud.datafyapi.com.br/v1/{phone_number_id}/messages"

payload = {
    "messaging_product": "whatsapp",
    "recipient_type": "individual",
    "to": "5511999999999",
    "type": "document",
    "document": {
        "link": "https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf",
        "filename": "boleto-pedido-7539.pdf",
        "caption": "Segue o boleto do seu pedido."
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "messaging_product": "whatsapp",
  "contacts": [
    {
      "input": "5511999999999",
      "wa_id": "5511999999999"
    }
  ],
  "messages": [
    {
      "id": "wamid.HBgNNTUxMTk5OTk5OTk5ORUCABIYFjNFQjA="
    }
  ]
}

{
  "error": {
    "message": "(#132018) There’s an issue with the parameters in your template",
    "type": "OAuthException",
    "code": 132018,
    "error_data": {
      "messaging_product": "whatsapp",
      "details": "Only one of media ID or link must be present"
    },
    "fbtrace_id": "AbCdEfGhIjK"
  }
}

{
  "statusCode": 401,
  "message": "Token inválido ou não encontrado."
}