> For the complete documentation index, see [llms.txt](https://developer-topup.esms.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer-topup.esms.vn/reference/cardcode.md).

# CARDCODE

Dive into the specifics of each API endpoint by checking out our complete documentation.

## Pets

All the methods associated with `CRUD`ing some pets. Which isn't as weird as it sounds:

{% content-ref url="/pages/ennUzBQb94JLc4sOYXPi" %}
[Nạp tiền vào tài khoản](/reference/topup/nap-tien-vao-tai-khoan.md)
{% endcontent-ref %}

## Users

Everything related to users:

{% content-ref url="/pages/gr6xypLiiBGpzH0g3D71" %}
[Broken mention](broken://pages/gr6xypLiiBGpzH0g3D71)
{% endcontent-ref %}

{% hint style="info" %}
**Good to know:** Using the 'Page Link' block lets you link directly to a page. If this page's name, URL or parent location changes, the reference will be kept up to date. You can also mention a page – like [Nạp tiền vào tài khoản](/reference/topup/nap-tien-vao-tai-khoan.md) – if you don't want a block-level link.
{% endhint %}