> For the complete documentation index, see [llms.txt](https://docs.greennode.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.greennode.ai/vcdn/api-developers.md).

# API Developers

## Overview <a href="#tong-quan" id="tong-quan"></a>

In addition to **vCDN Portal** , we also provide you with a set of APIs to work with our system. Please refer to the detailed instructions for using vCDN API [here](https://api-docs.vngcloud.vn/vcdn/#vcdn-api-documentation) .

To work with vCDN API, you need to have at least one valid **API Key . API Key** is a security tool that allows access to vCDN API system without using Username and Password account.

## Detail <a href="#chi-tiet" id="chi-tiet"></a>

1. **Key Expiration Time**
   * You can choose the key expiration time from 1 minute to 1 year depending on your needs.
2. **Allows domains to call APIs**

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## **Implementation process** <a href="#quy-trinh-thuc-hien" id="quy-trinh-thuc-hien"></a>

**Step 1:** Access vCDN Portal at [https://vcdn.vngcloud.vn](https://vcdn.vngcloud.vn/live-entrypoint/list.html)

**Step 2:** Select **API Key** , then select **Create new.**

<figure><img src="/files/Rhk6RlICLcI6cESXZ1DG" alt=""><figcaption></figcaption></figure>

**Step 3:** Select the expiration time of the API Key you want.

**Step 4:** Enter the domain you allow to call the API, you can also skip this information field if you do not need it.