> ## Documentation Index
> Fetch the complete documentation index at: https://docs.eximpe.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Credentials for API Access

> To begin using EximPe’s APIs, you need to retrieve the credentials — `client_id`, `client_secret` .

## Where to Find Your Credentials

Navigate to the **Developer** section of the **EximPe Dashboard**. You’ll find:

* **Client ID**
* **Client Secret**

These are required to authenticate your API calls.

## API Version Header

All API requests must include the `X-API-Version` header to specify which version of the API you're using:

* **Version 2.0**: `X-API-Version: 2.0.0`

This header ensures your integration uses the correct API version and helps maintain backward compatibility.

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## If You Are a Payment Service Provider (PSP)

Receiving payments on behalf of your merchants:

1. **Add a Merchant**
   * Before you can make API calls on behalf of a merchant, you must first add them.
   * **Sandbox**: A dummy merchant is automatically created upon signup.
   * Refer to the [Adding Merchants](./adding-merchants) guide for details.
2. **Activate the Merchant**
   * In **Sandbox**, merchants are activated instantly.
   * In **Production**, merchant activation follows due diligence in compliance with RBI guidelines.
3. **Retrieve the** `merchant_id`\
   Once a merchant is activated, you’ll receive their `merchant_id`, which, along with the `client_id` and `client_secret`, is required to authenticate and validate API requests.

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In **Production**, you will receive **Credentials** (`client_id` and `client_secret`) for secure API usage upon Account Activation.

<Note>
  For **PSPs**, payments can only be initiated upon successful activation of the corresponding merchant.
</Note>

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