curl -X POST "https://api.bulkneo.com/v1/messages/audio" -H "apikey: YOUR_API_KEY" -H "Content-Type: application/json" -d "{\"instance_id\":\"3f9c1a2b-7d4e-4c81-9f0a-2b6d5e8c1a34\",\"to\":\"919000000000\",\"url\":\"https://example.com/greeting.mp3\"}"

const options = {
  method: 'POST',
  headers: {apikey: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    instance_id: '3f9c1a2b-7d4e-4c81-9f0a-2b6d5e8c1a34',
    to: '919000000000',
    url: 'https://example.com/greeting.mp3'
  })
};

fetch('https://api.bulkneo.com/v1/messages/audio', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.bulkneo.com/v1/messages/audio"

payload = {
    "instance_id": "3f9c1a2b-7d4e-4c81-9f0a-2b6d5e8c1a34",
    "to": "919000000000",
    "url": "https://example.com/greeting.mp3"
}
headers = {
    "apikey": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "success": true,
  "data": {
    "instance_id": "3f9c1a2b-7d4e-4c81-9f0a-2b6d5e8c1a34",
    "to": "919000000000",
    "type": "audio",
    "status": "sent",
    "message_id": "3EB0C1D2F4A5B6C7D8E9",
    "provider_status": "PENDING"
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "invalid_request",
    "message": "Field \"text\" is required and must be a non-empty string."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "invalid_api_key",
    "message": "Invalid or revoked API key."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "subscription_expired",
    "message": "Your subscription has expired. Renew it to continue sending messages."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "trial_quota_exceeded",
    "message": "Trial message quota reached (500 messages). Upgrade to a paid plan to keep sending.",
    "details": {
      "trial_message_limit": 500
    }
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "instance_not_found",
    "message": "Instance not found. Check the instance_id and that it belongs to your account."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "instance_not_connected",
    "message": "This WhatsApp instance is not connected. Connect it before sending messages."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "media_fetch_failed",
    "message": "The media at that URL could not be downloaded. Check the link is public, direct, and still valid."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Rate limit exceeded, retry in 12s.",
    "details": {
      "retry_after_seconds": 12,
      "limit_per_minute": 20,
      "scope": "messages"
    }
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "internal_error",
    "message": "An unexpected error occurred."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}

{
  "success": false,
  "error": {
    "code": "upstream_unavailable",
    "message": "The messaging service is temporarily unavailable. Please retry shortly."
  },
  "request_id": "b1f2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d"
}