curl --request POST \
  --url https://api.opencard.io/api/v1/issuers/{slug}/cards/{cardId}/transaction_states \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": "tx_1234567891",
  "state": "cleared",
  "type": "CARD_PURCHASE",
  "invoice_number": null,
  "original_amount": 109.38,
  "original_currency": "SEK",
  "accounting_amount": 109.38,
  "accounting_currency": "SEK",
  "exchange_rate": 1,
  "vat_rate": 0.25,
  "vat_amount": 21.88,
  "vat_currency": "SEK",
  "purchase_merchant": "Coop Vasagatan",
  "purchase_time": "2025-11-17T15:35:11Z",
  "purchase_country": "SE",
  "purchase_city": "STOCKHOLM",
  "mcc_code": "5411",
  "merchant_number": "12345678",
  "terminal_id": "TERM001",
  "rrn": "123456789012",
  "auth_code": "A1B2C3"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    id: 'tx_1234567891',
    state: 'cleared',
    type: 'CARD_PURCHASE',
    invoice_number: null,
    original_amount: 109.38,
    original_currency: 'SEK',
    accounting_amount: 109.38,
    accounting_currency: 'SEK',
    exchange_rate: 1,
    vat_rate: 0.25,
    vat_amount: 21.88,
    vat_currency: 'SEK',
    purchase_merchant: 'Coop Vasagatan',
    purchase_time: '2025-11-17T15:35:11Z',
    purchase_country: 'SE',
    purchase_city: 'STOCKHOLM',
    mcc_code: '5411',
    merchant_number: '12345678',
    terminal_id: 'TERM001',
    rrn: '123456789012',
    auth_code: 'A1B2C3'
  })
};

fetch('https://api.opencard.io/api/v1/issuers/{slug}/cards/{cardId}/transaction_states', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.opencard.io/api/v1/issuers/{slug}/cards/{cardId}/transaction_states"

payload = {
    "id": "tx_1234567891",
    "state": "cleared",
    "type": "CARD_PURCHASE",
    "invoice_number": None,
    "original_amount": 109.38,
    "original_currency": "SEK",
    "accounting_amount": 109.38,
    "accounting_currency": "SEK",
    "exchange_rate": 1,
    "vat_rate": 0.25,
    "vat_amount": 21.88,
    "vat_currency": "SEK",
    "purchase_merchant": "Coop Vasagatan",
    "purchase_time": "2025-11-17T15:35:11Z",
    "purchase_country": "SE",
    "purchase_city": "STOCKHOLM",
    "mcc_code": "5411",
    "merchant_number": "12345678",
    "terminal_id": "TERM001",
    "rrn": "123456789012",
    "auth_code": "A1B2C3"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.opencard.io/api/v1/issuers/{slug}/cards/{cardId}/transaction_states",
  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([
    'id' => 'tx_1234567891',
    'state' => 'cleared',
    'type' => 'CARD_PURCHASE',
    'invoice_number' => null,
    'original_amount' => 109.38,
    'original_currency' => 'SEK',
    'accounting_amount' => 109.38,
    'accounting_currency' => 'SEK',
    'exchange_rate' => 1,
    'vat_rate' => 0.25,
    'vat_amount' => 21.88,
    'vat_currency' => 'SEK',
    'purchase_merchant' => 'Coop Vasagatan',
    'purchase_time' => '2025-11-17T15:35:11Z',
    'purchase_country' => 'SE',
    'purchase_city' => 'STOCKHOLM',
    'mcc_code' => '5411',
    'merchant_number' => '12345678',
    'terminal_id' => 'TERM001',
    'rrn' => '123456789012',
    'auth_code' => 'A1B2C3'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

{
  "ok": false,
  "error": "duplicate_transaction_state"
}