Substitution Data

Substitution data supplies variables for server-side templates. Use it when Mailtarget owns the template and your application supplies recipient-specific values.

{
  "templateId": "tmpl_receipt_v3",
  "substitutionData": {
    "order_id": "10042",
    "amount": "250000"
  }
}

Keep variable names stable and validate required values before sending.