curl --request POST \
  --url https://api.openfiskal.com/v1/operations/{operationId}/complete \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --header 'If-Match: <if-match>' \
  --header 'X-OpenFiskal-Merchant: <x-openfiskal-merchant>' \
  --data '
{
  "payments": [
    {
      "payment_id": "pay_1001_card",
      "method": "card",
      "amount": "47.50",
      "currency": "EUR",
      "status": "captured",
      "processor": "sumup",
      "card_brand": "visa",
      "processor_reference": "ch_123",
      "processed_at": "2026-02-26T12:05:00.000Z",
      "gift_card_id": "gc_abc123"
    }
  ],
  "completed_at": "2026-02-26T12:05:00.000Z"
}
'

import requests

url = "https://api.openfiskal.com/v1/operations/{operationId}/complete"

payload = {
    "payments": [
        {
            "payment_id": "pay_1001_card",
            "method": "card",
            "amount": "47.50",
            "currency": "EUR",
            "status": "captured",
            "processor": "sumup",
            "card_brand": "visa",
            "processor_reference": "ch_123",
            "processed_at": "2026-02-26T12:05:00.000Z",
            "gift_card_id": "gc_abc123"
        }
    ],
    "completed_at": "2026-02-26T12:05:00.000Z"
}
headers = {
    "X-OpenFiskal-Merchant": "<x-openfiskal-merchant>",
    "If-Match": "<if-match>",
    "Idempotency-Key": "<idempotency-key>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-OpenFiskal-Merchant': '<x-openfiskal-merchant>',
    'If-Match': '<if-match>',
    'Idempotency-Key': '<idempotency-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    payments: [
      {
        payment_id: 'pay_1001_card',
        method: 'card',
        amount: '47.50',
        currency: 'EUR',
        status: 'captured',
        processor: 'sumup',
        card_brand: 'visa',
        processor_reference: 'ch_123',
        processed_at: '2026-02-26T12:05:00.000Z',
        gift_card_id: 'gc_abc123'
      }
    ],
    completed_at: '2026-02-26T12:05:00.000Z'
  })
};

fetch('https://api.openfiskal.com/v1/operations/{operationId}/complete', 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.openfiskal.com/v1/operations/{operationId}/complete",
  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([
    'payments' => [
        [
                'payment_id' => 'pay_1001_card',
                'method' => 'card',
                'amount' => '47.50',
                'currency' => 'EUR',
                'status' => 'captured',
                'processor' => 'sumup',
                'card_brand' => 'visa',
                'processor_reference' => 'ch_123',
                'processed_at' => '2026-02-26T12:05:00.000Z',
                'gift_card_id' => 'gc_abc123'
        ]
    ],
    'completed_at' => '2026-02-26T12:05:00.000Z'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "Idempotency-Key: <idempotency-key>",
    "If-Match: <if-match>",
    "X-OpenFiskal-Merchant: <x-openfiskal-merchant>"
  ],
]);

$response = curl_exec($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.openfiskal.com/v1/operations/{operationId}/complete"

	payload := strings.NewReader("{\n  \"payments\": [\n    {\n      \"payment_id\": \"pay_1001_card\",\n      \"method\": \"card\",\n      \"amount\": \"47.50\",\n      \"currency\": \"EUR\",\n      \"status\": \"captured\",\n      \"processor\": \"sumup\",\n      \"card_brand\": \"visa\",\n      \"processor_reference\": \"ch_123\",\n      \"processed_at\": \"2026-02-26T12:05:00.000Z\",\n      \"gift_card_id\": \"gc_abc123\"\n    }\n  ],\n  \"completed_at\": \"2026-02-26T12:05:00.000Z\"\n}")

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

	req.Header.Add("X-OpenFiskal-Merchant", "<x-openfiskal-merchant>")
	req.Header.Add("If-Match", "<if-match>")
	req.Header.Add("Idempotency-Key", "<idempotency-key>")
	req.Header.Add("Authorization", "Bearer <token>")
	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.openfiskal.com/v1/operations/{operationId}/complete")
  .header("X-OpenFiskal-Merchant", "<x-openfiskal-merchant>")
  .header("If-Match", "<if-match>")
  .header("Idempotency-Key", "<idempotency-key>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"payments\": [\n    {\n      \"payment_id\": \"pay_1001_card\",\n      \"method\": \"card\",\n      \"amount\": \"47.50\",\n      \"currency\": \"EUR\",\n      \"status\": \"captured\",\n      \"processor\": \"sumup\",\n      \"card_brand\": \"visa\",\n      \"processor_reference\": \"ch_123\",\n      \"processed_at\": \"2026-02-26T12:05:00.000Z\",\n      \"gift_card_id\": \"gc_abc123\"\n    }\n  ],\n  \"completed_at\": \"2026-02-26T12:05:00.000Z\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.openfiskal.com/v1/operations/{operationId}/complete")

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

request = Net::HTTP::Post.new(url)
request["X-OpenFiskal-Merchant"] = '<x-openfiskal-merchant>'
request["If-Match"] = '<if-match>'
request["Idempotency-Key"] = '<idempotency-key>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"payments\": [\n    {\n      \"payment_id\": \"pay_1001_card\",\n      \"method\": \"card\",\n      \"amount\": \"47.50\",\n      \"currency\": \"EUR\",\n      \"status\": \"captured\",\n      \"processor\": \"sumup\",\n      \"card_brand\": \"visa\",\n      \"processor_reference\": \"ch_123\",\n      \"processed_at\": \"2026-02-26T12:05:00.000Z\",\n      \"gift_card_id\": \"gc_abc123\"\n    }\n  ],\n  \"completed_at\": \"2026-02-26T12:05:00.000Z\"\n}"

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

{
  "id": "<string>",
  "merchant_id": "<string>",
  "source": "POS",
  "status": "open",
  "currency": "EUR",
  "resource_version": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "pretax_amount": "<string>",
  "tax_amount": "<string>",
  "tip_amount": "<string>",
  "total_amount": "<string>",
  "line_items": [
    {
      "id": "<string>",
      "type": "item",
      "title": "<string>",
      "quantity": 123,
      "unit_price": "<string>",
      "total_amount": "<string>",
      "sku_identifier": "TSHIRT-BLUE-M",
      "taxes": [
        {
          "id": "<string>",
          "name": "<string>",
          "rate": "<string>",
          "tax_amount": "<string>"
        }
      ],
      "gift_card_id": "<string>"
    }
  ],
  "payments": [
    {
      "id": "<string>",
      "payment_id": "<string>",
      "method": "<string>",
      "amount": "<string>",
      "currency": "<string>",
      "status": "captured",
      "processor": "<string>",
      "card_brand": "<string>",
      "processor_reference": "<string>",
      "processed_at": "2023-11-07T05:31:56Z",
      "gift_card_id": "<string>"
    }
  ],
  "type": "sale",
  "cart_level_discounts": [
    {
      "id": "<string>",
      "amount": "<string>",
      "description": "<string>"
    }
  ],
  "location_id": "<string>",
  "register_id": "<string>",
  "session_id": "<string>",
  "external_id": "<string>",
  "fiscal_information": {
    "regime": "KassenSichV",
    "document_number": "<string>",
    "document_type": "<string>",
    "tss_serial_number": "<string>",
    "pos_client_serial_number": "<string>",
    "signature_algorithm": "<string>",
    "time_format": "<string>",
    "start_event": {
      "signed_at": "2023-11-07T05:31:56Z"
    },
    "end_event": {
      "signed_at": "2023-11-07T05:31:56Z",
      "transaction_counter": 123,
      "signature": "<string>",
      "public_key": "<string>",
      "process_type": "<string>",
      "process_data": "<string>"
    },
    "verification": {
      "qr_data": "<string>"
    }
  },
  "completed_at": "2023-11-07T05:31:56Z",
  "voided_at": "2023-11-07T05:31:56Z",
  "void_reason": "<string>",
  "note": "<string>"
}

{
  "code": "invalid_request",
  "message": "The request body is malformed.",
  "retryable": false
}

{
  "code": "unauthorized",
  "message": "Authentication failed.",
  "retryable": false
}

{
  "code": "forbidden",
  "message": "The authenticated caller cannot access this resource.",
  "retryable": false
}

{
  "code": "not_found",
  "message": "The requested resource does not exist.",
  "retryable": false
}

{
  "code": "operation_invalid_state",
  "message": "Only OPEN operations can be completed.",
  "retryable": false
}

{
  "code": "precondition_failed",
  "message": "Resource version mismatch.",
  "retryable": true,
  "details": {
    "expected_resource_version": 1,
    "current_resource_version": 2
  }
}

{
  "code": "regime_validation_failed",
  "message": "The payload violates regime-specific validation rules.",
  "retryable": false
}

{
  "code": "precondition_required",
  "message": "This operation requires an If-Match header.",
  "retryable": false
}