> For the complete documentation index, see [llms.txt](https://docs.paykun.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.paykun.com/technical-guide/untitled/authentication.md).

# ‌Authentication

To perform any task using PayKun API you will need to provide credentials, below is the details of which type of credentials you will need on the basis of your platform:

### **1.Web**

For the various technical server-side requests like transaction initialization, transaction details retrieval, refund details, settlement details, etc, you need the unique Access Token obtained from your Merchant Account.‌

PayKun provides [unique Access Token and API Secret Key](/technical-guide/api-encryption-key-guide.md) (for web) to every merchant, which is needed to authenticate all of the above mentioned requests.‌

### **2.Mobile**

For the various technical server-side requests like transaction initialization, transaction details retrieval, refund details, settlement details, etc, you need the unique Access Token obtained from your Merchant Account.‌

PayKun provides [unique Access Token and API Secret Key](/technical-guide/api-encryption-key-guide.md) (for app) to every merchant, which is needed to authenticate all of the above mentioned requests.‌

{% hint style="info" %}
Merchant ID, Access Token & API Secret For Live environment and sandbox environment are different and you can generate it from their respective dashboard.
{% endhint %}