curl --request POST 'https://api.printools.io/v1/invoices/11111111-2222-3333-4444-555555555555/mark-paid' \
  --header 'X-API-Key: $PRINTOOLS_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{"method":"example","reference":"example","paidAt":"2026-09-07T12:00:00.000Z"}'

import requests

url = "https://api.printools.io/v1/invoices/{invoiceId}/mark-paid"

payload = {
    "method": "example",
    "reference": "example",
    "paidAt": "2026-09-07T12:00:00.000Z"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({method: 'example', reference: 'example', paidAt: '2026-09-07T12:00:00.000Z'})
};

fetch('https://api.printools.io/v1/invoices/{invoiceId}/mark-paid', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.printools.io/v1/invoices/{invoiceId}/mark-paid",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'method' => 'example',
    'reference' => 'example',
    'paidAt' => '2026-09-07T12:00:00.000Z'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.printools.io/v1/invoices/{invoiceId}/mark-paid"

	payload := strings.NewReader("{\n  \"method\": \"example\",\n  \"reference\": \"example\",\n  \"paidAt\": \"2026-09-07T12:00:00.000Z\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-Key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.printools.io/v1/invoices/{invoiceId}/mark-paid")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"method\": \"example\",\n  \"reference\": \"example\",\n  \"paidAt\": \"2026-09-07T12:00:00.000Z\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.printools.io/v1/invoices/{invoiceId}/mark-paid")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"method\": \"example\",\n  \"reference\": \"example\",\n  \"paidAt\": \"2026-09-07T12:00:00.000Z\"\n}"

response = http.request(request)
puts response.read_body

{
  "status": true,
  "message": "OK",
  "data": {
    "id": "<string>",
    "quoteId": "<string>",
    "invoiceRef": "<string>",
    "currency": "<string>",
    "subtotalCents": 123,
    "gstCents": 123,
    "amountCents": 123,
    "status": "<string>",
    "lineItemsSnapshot": "<unknown>",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "clientId": "<string>",
    "contactId": "<string>",
    "dueDate": "2023-12-25",
    "notes": "<string>",
    "pinchPaymentLinkUrl": "<string>",
    "pinchPaymentId": "<string>",
    "xeroInvoiceId": "<string>",
    "qboSalesReceiptId": "<string>",
    "xeroPaymentId": "<string>",
    "xeroInvoiceUrl": "<string>",
    "qboInvoiceId": "<string>",
    "qboPaymentId": "<string>",
    "qboInvoiceUrl": "<string>",
    "paidMethod": "<string>",
    "paidReference": "<string>",
    "paidAt": "2023-11-07T05:31:56Z",
    "sentAt": "2023-11-07T05:31:56Z",
    "pinchRefundId": "<string>",
    "refundedAmountCents": 123,
    "refundReason": "<string>",
    "refundedAt": "2023-11-07T05:31:56Z",
    "voidReason": "<string>",
    "voidedAt": "2023-11-07T05:31:56Z",
    "paymentClaimedAt": "2023-11-07T05:31:56Z",
    "paymentClaimedMethod": "<string>",
    "paymentClaimedReference": "<string>",
    "paymentClaimedNote": "<string>"
  }
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}

{
  "error": "<string>",
  "message": "<string>",
  "status": false
}