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## Playground, boarding and API enhancements

> **Note**
>
> The Embedded Components Playground has since been deprecated and is no longer available. See the [deprecation note](/changelog/embedded-components/2026/4/15) for details.

This release includes a new developer tool, improvements to the boarding application process, and enhancements to the API for better tokenization and error handling.

## Embedded Components Playground

We've released the Embedded Components Playground, a new developer tool that lets you build and preview embedded components in your browser. Learn more in the [guide](/guides/pay-in-components-playground), or try it out at `playground.payabli.com`.

## Boarding

These changes impact the UI and boarding APIs.

* Improved boarding application field validations to support Canadian applicants.

## API

These changes impact the APIs.

* Made enhancements to the TokenStorage/add endpoint and embedded components to improve the tokenization process for some cards. Before, tokenization sometimes failed for cards if they weren't being tokenized as part of a transaction. We've added two new keys to the tokenization request body: `fallbackAuth` and `fallbackAuthAmount` to run an authorization on cards while tokenizing them. See the [/TokenStorage/add](/developers/api-reference/tokenstorage/save-a-payment-method-tokenize) reference, or the configuration reference section of the embedded components docs for more details.
* Improved tokenization error handling.