> For the complete documentation index, see [llms.txt](https://onestore-dev.gitbook.io/dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://onestore-dev.gitbook.io/dev/cht/tools/billing/v21.md).

# API V7 (SDK V21) ONE store In-App支付使用指南及下載

## ONE store的最新In-App支付API V7（SDK V21）上線了。                        

歡迎您使用支援更强大、更多功能的最新版本。

{% hint style="info" %}
此頁面是In-App支付API V7(SDK V21)的使用指南頁面，正在使用API V5或API V6的開發公司可以遷移到API V7。                                                    

If you are comfortable with English, please change the language to English from the upper right side in this page.
{% endhint %}

{% hint style="info" %}
有關One Store In-App付費 App的全球發布指南，請參考以下内容。

* [籌備全球發布](/dev/cht/glb.md)
  {% endhint %}


---

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