Google Apps Script

There is no SDK for Google Apps Script and none is needed: one HTTP request with a key in the header, a template name and your fields. The example below is the whole integration.

How to set it up

1. 01Create a key in the dashboard under Keys and keep it out of your source.
2. 02Send the request below; the answer holds the job id and its status.
3. 03Want to know the paper moved? Poll /v1/jobs/{id}, or take an outgoing webhook.

function printBon() {
  UrlFetchApp.fetch('https://instntprint.com/v1/jobs', {
    method: 'post',
    contentType: 'application/json',
    headers: { Authorization: 'Bearer ' + SLEUTEL },
    payload: JSON.stringify({"printer":"Balie","template":"Kassabon","data":{"totaal":"3.80","betaalwijze":"Pin"}}),
  });
}