Error Codes

{
  "success": false,
  "error": {
    "code": "ERROR_CODE",
    "message": "Human-readable error message"
  }
}

const response = await fetch(url, options);
const data = await response.json();

if (!data.success) {
  switch (data.error.code) {
    case 'INVALID_API_KEY':
      throw new Error('Check your API key');
    case 'MONTHLY_LIMIT_EXCEEDED':
      throw new Error('Monthly credit limit exceeded');
    case 'INSUFFICIENT_CREDITS':
      throw new Error('Not enough credits');
    case 'DOMAIN_REQUIRED':
    case 'INVALID_DOMAIN_FORMAT':
      throw new Error('Invalid domain');
    default:
      throw new Error(data.error.message);
  }
}