Pay-as-You-Go Model

In a pay-as-you-go business model, users have the flexibility to purchase credits in advance and use them as needed. This model is commonly used in applications where users consume services on a per-usage basis, such as cloud computing, telecommunication services, online marketplaces and gaming platforms.

Credit Bundles

Creduse allows you to offer credit bundles at different price points and expiration periods. For example, you can have the following credit bundles:

Credits	Price	Expiry
100	$9.99	1 year
500	$14.99	1 year
1000	$19.99	1 year

Users can choose the bundle that best suits their needs and purchase credits upfront. These credits can be used whenever the user wants within the specified expiry period.

Implementation

Step 1: Add Credits

To add a credit bundle to a user, such as the 500 credits bundle, you can simply call the /add endpoint provided by Creduse. This endpoint allows you to add the purchased credits to the user's account with the specified validity period:

curl https://api.creduse.com/add \
    -H "Authorization : Bearer $YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
        "end_user_id": "UUID",
        "amount": 500,
        "validity_days": 365
        }

Step 2: Subtract Credits

As the user consumes your service or performs various actions, you can subtract credits from their balance using the /subtract endpoint. This deduction reflects the usage or consumption of your service. For example, if a user consumes 50 credits, you can deduct them from their balance as follows:

curl https://api.creduse.com/subtract \
    -H "Authorization : Bearer $YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
        "end_user_id": "UUID",
        "amount": 50,
        }

When the user's balance reaches zero, you can prompt them to purchase additional credit bundles to continue using your service.

Related Resources

For further details about:

• the /subtract endpoint, please refer to the Subtract endpoint documentation.
• the credit subtraction logic, please refer to the Credit Subtraction Logic.
• the credit balance retrieval, please refer to the Get Active Balance endpoint documentation.
• the free trial model, please refer to the Free Trial use case.