Card Capture IFrame API

JavaScript API to work with Card Capture IFrame

To initiate the Card Capture IFrame, please insert the IFrame tag into your target page.

  style="border: 0;"

Where cardCaptureIframeUrl is valid Card Capture URL.

IFrame communication

To communicate with the IFrame to submit form or get results you should use postMessage browser API.

Submit Form

To submit Card Capture form you should trigger submit event.

const cardCaptureIframe = document.getElementById("cardCaptureIframe");
cardCaptureIframe.contentWindow.postMessage("submit", "");

Validate Form

To Validate Card Capture form you should trigger validate event.

This validation method can be used to get validity from state from your js code. With this you can build workflows on your side based on this information. For example, you can prevent form submission if the card in the iframe is not valid.

This validation also triggers on submit event and does the same validations as you can see in real time. So, if you don't have any external logic which is based on card form validity state you can just use the "submit" method.

const cardCaptureIframe = document.getElementById("cardCaptureIframe");
cardCaptureIframe.contentWindow.postMessage("validate", "");

Handle response

To handle responses from Card Capture Form you should create listener function.

const PCI_PROXY_DOMAIN = "";
const listener = (event) => {
  if (event.origin !== PCI_PROXY_DOMAIN) {
  if ( {
    console.log("card valid: ",;
  if ( {

window.addEventListener("message", listener);

Validate response

  "event_type": "validate",
  "valid": true|false

Submit response

  "event_type": "submit",
  "success": true,
  "card": {
    "card_number": "411111******1111",
    "card_token": "<token>",
    "cardholder_name": "JHON DOE",
    "expiration_month": "11",
    "expiration_year": "2023",
    "service_code": "***",
    "card_type": "visa"

IFrame configuration

Accepted card types

Param: only|except

Value: list of card types

Default: none

You can pass additional query param for card capture iframe and configure which cards you accept. This can be done in two ways.

  1. You can set a list of cards you accept and only these cards would be allowed to be created from an iframe.

  2. You can provide a list of cards you want to exclude, for example American Express.

To configure the list of card types you want to accept you should provide a only query param with a list of card types.

Example to accept only visa and mastercard:<SESSION_TOKEN>&only=visa,mastercard

To accept all cards except some specific type you should provide except query params with list of card types.

Example to exclude American Express:<SESSION_TOKEN>&except=american-express

List of card types:

  • visa

  • mastercard

  • american-express

  • money-club

  • discover

  • jcb

  • unionpay

  • maestro

  • link

  • me

  • hyper

  • hypercard

So if you want just to accept all cards except American Express you need to modify your card capture iframe url to something like this<SESSION_TOKEN>&except=american-express

Custom styles

Param: style

Value: style name

Default: none

Card capture iframe can be customized with your own css to match your needed look and feel. To load additional css styles you need to provide style query param with styles name. These styles can be added to your account by contacting support.


Param: lang

Value: en|ru

Default: en

To change language of your capture form lang query param needed to be specified.

Supported languages:

  • en

  • ru

Any additional language can be added by contacting support.

Service Code


Param: service_code_optional

Value: true|false

Default: false

Make service code optional and not require.


Param: service_code_visible

Value: true|false

Default: true

Make service code not visible.

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