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Documentation Index

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The print method provides direct access to the VPOS terminal’s integrated thermal printer. This allows the client application to generate physical records for the customer, such as transaction receipts, loyalty vouchers, or fueling summaries. Use this method to:
  • Print finalized sale details, including merchant info, masked card data, and totals for transaction receipts.
  • Generate a physical record of the volume, grade, and price per unit after the nozzle is holstered.
  • Provide customers with discount codes or reward vouchers based on their current purchase.
  • Print diagnostic or status reports directly at the station for maintenance logs.

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Requests

The request includes the raw text content or structured data you wish to print. You can use standard escape characters for basic formatting like new lines. The following example shows a typical request: 
{
"command": "print",
"requestId": "req-012",
"data": {
"printData": "Transaction Receipt\n-------------------\nAmount: $20.00\nDate: 2026-01-
13\nApproved"
}
}

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Parameter Definitions

The table below describes the parameters available for this request:
NameTypeRequiredDescription
commandstringYesSet to "print".
requestIdstringYesA unique identifier for tracking the response.
contentstringYesThe text data to be printed. Use \n for line breaks.
cutPaperbooleanNoIf true, the printer will perform a full cut after the content is printed (if hardware supports it).

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Responses

The terminal returns an acknowledgment once the print job has been successfully queued or completed by the hardware. The following example shows a typical response: 
{
"requestId": "req-012",
"data": {
"printed": true,
"characterCount": 71
}
}

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Response Parameters

The response confirms the status of the peripheral action:
NameTypeDescription
requestIdstringEchoes the unique identifier of the original request.
statusstringReturns SUCCESS if the print job was accepted, or ERROR if the printer is out of paper or disconnected.