Print

Print operations queue a receipt on the terminal's thermal printer (Sunmi P3, Sunmi P2 SE) through Kushki's cloud relay. You describe the receipt as an ordered commands array; array order is physical paper order.

Beta — Early Access

Kushki ONE Cloud is currently in Beta for Chile 🇨🇱. Do not deploy to production without coordinating with the Kushki integration team.

Operations

Operation	Endpoint	Returns
Create Print Job	`POST /sync/print`	`202 Accepted` with status `PENDING`
Get Print Job Status	`POST /sync/print_job`	`PENDING`, `COMPLETED` or `FAILED`

Both require the same signed Authorization and timestamp headers as the Payment API.

WARNING

Printing is asynchronous even on the /sync/ prefix. The 202 means queued, not printed. The real outcome arrives by webhook or polling.

How a job resolves

POST .../sync/print with your commands array → 202 and a printJobId.

The terminal prints. Then either:

Webhook — supply webhookUrl in the request and Kushki POSTs the final state to it. Fire-and-forget, not retried.

Polling — POST .../sync/print_job with print_job_id in the body, every 2–3 seconds, until COMPLETED or FAILED.

Field	Why it matters
`printJobId`	Your idempotency key. Reuse it on retries — the terminal deduplicates and will not print twice
`externalReference`	Free-form traceability. Echoed back in status and webhook responses
`skipIfBusy`	`true` returns `409` instead of queueing. Never set it to `true` for a payment receipt

Commands

Write type in lowercase. Every other enum value — align, dividerType, algorithm, errorLevel — is UPPERCASE.

`type`	What it prints
`text`	A line or paragraph, with size, alignment, bold, italic, underline
`columns`	Proportional columns on one line — item and price
`divider`	Full-width rule: `SOLID`, `DOTTED` or `EMPTY`
`feed`	N blank lines
`space`	Pixel-precise vertical whitespace
`cut`	The auto-cutter. Silently ignored on cutterless terminals
`image`	A Base64 PNG/JPG, typically the merchant logo
`qr`	A QR code generated in printer hardware
`barcode`	A CODE128 barcode generated in printer hardware

{
  "printJobId": "RECEIPT-20240317-001",
  "commands": [
    { "type": "text", "text": "MI COMERCIO CHILE\n", "align": "CENTER", "size": 32, "bold": true },
    { "type": "divider", "dividerType": "DOTTED", "offset": 10 },
    { "type": "columns", "columns": [
        { "text": "Producto Premium", "weight": 2, "align": "LEFT" },
        { "text": "$10.000", "weight": 1, "align": "RIGHT" }
    ]},
    { "type": "feed", "lines": 3 },
    { "type": "cut" }
  ]
}

Amounts are CLP — print them with no decimals ($10.000), matching what the terminal charged.

Per-command parameters, defaults and examples live on Create Print Job.

Practical limits

Rule	Detail
Always end with `feed` + `cut`	Advance ≥ 3 lines, or the cut lands on printed content
Max image width	384 px on Sunmi hardware
Logos	Prefer `BINARIZATION` — sharper edges on monochrome art. `DITHERING` is for photos
Base64	Raw string only. The `data:image/png;base64,` prefix makes the image fail silently
HTTP timeout	≥ 15 seconds — the relay adds latency to the `202`

Hardware failures come back as errorCode: OUT_OF_PAPER, COVER_OPEN, PAPER_JAM, PRINTER_HOT, CUTTER_ERROR, OFFLINE and others. Surface them to the cashier — most are fixed by someone touching the device.

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Operations#

How a job resolves#

Commands#

Practical limits#

Operations

How a job resolves

Commands

Practical limits