> For the complete documentation index, see [llms.txt](https://articles.optty.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://articles.optty.com/payment-methods-best-practices/how-to-apply-api-credentials.md).

# How to apply API Credentials

## Overview

Every Payment Method provides their Merchant Credentials in slightly differing formats. On this page, we will help you to understand how to add some of these non-standard credentials into the Optty Universal Payment Platform. 

## Grab

### Add Credentials

Grab will provide 5 components for the API credentials. Please follow the format below to add the grab credentials to the Optty Universal Payment Platform. \
Between each of the components, you will need to add a | (Pipe Character) with no spaces before or after it.

**API Key:** Partner ID|Client ID|Merchant\_ID 

**Secret :** Partner Secret|Client Secret

## Billease

To Capture the Billease API credentials, please follow the steps below: 

{% hint style="info" %}
Use 

*shop\_code* as Api Key 

*access\_token* as Api Secret
{% endhint %}

1. Login to Billease merchant portal -> Select Profile -> Select Shops Copy **Shop Code** as **API Key**

![](/files/udeIv4JEWeKrI9HzPMDi)

2\. Select Integration, Click on the **Copy Icon** beside the **Token ID**, copy the API Token as the **API Secret**. 

![](/files/4gK356pzkbzejTFzQZRh)

## ZIP AU

**Add Credentials**

You only require the `private key` to enable the **ZIP AU** whereas the public key would be for the Zip assets. 

Enter the `Private Key` as both **API KEY** and **SECRET** field. 

![](/files/UG5JoaoZMGnUEeDteMfZ)

You can find more information on authentication in our developer documentation [here](https://developers.zip.co/v2/reference/authentication)