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

# Overview

With Nadles, you get a billing engine optimized specifically for API monetization, ensuring accurate and efficient billing for your API-based business model.

With the recent release of Billing 2.0, Nadles has become the world's most advanced monetization platform.

<Frame>
  <img src="https://mintcdn.com/nadles/WGoKyNQHhztkDHRn/images/pricing/product-price-list.png?fit=max&auto=format&n=WGoKyNQHhztkDHRn&q=85&s=247fb59b1bad82f3c94aa40fb1f85eb0" alt="" width="2410" height="1010" data-path="images/pricing/product-price-list.png" />
</Frame>

## Features

<AccordionGroup>
  <Accordion title="Recurring subscriptions" icon="repeat" iconType="sharp-solid">
    Regular subscriptions allow you to periodically bill your customers for provided services at any arbitrary schedule.
  </Accordion>

  <Accordion title="Prepaid models" icon="gas-pump">
    Prepaid models allow your customers to buy a certain amount of
    [billable metrics units](/products/billable-metrics) and use them until running out of balance.

    A good example is, your customers buy 1000 credits, use them and top up as needed.

    Another example is a Trial plan with 500 API calls included. Once the customer makes 500 requests, Nadles revokes access.
  </Accordion>

  <Accordion title="Pay as you go" icon="gauge">
    Nadles API gateway and billing engine work together to track usage per subscription,
    periodically aggregate the usage data, calculate and bill amounts due.
  </Accordion>

  <Accordion title="Mixed billing periods" icon="calendar-range">
    You can combine several prices with different billing intervals in a single subscription.

    It's easier to illustrate with an example.
    Let's say, you would like to offer an annual plan with overages paid monthly.

    E.g.,

    * \$400 a year
    * 5000 API calls per month included
    * \$0.1 overage, billed monthly

    With Nadles, implementing this kind of pricing can be done with several mouse clicks.
  </Accordion>

  <Accordion title="Separate billing and usage aggregation schedules" icon="calendars">
    Sometimes you'd like to record usage more often and collect a payment once in a while.
    You can do so by setting different billing and usage aggregation periods.

    For example, you can configure Nadles to aggregate usage daily and bill for the accrued amount once a month.
  </Accordion>

  <Accordion title="Arbitrary one-time charges" icon="money-bill-1">
    Are you noticing unusually high usage from a customer and worried their upcoming payment might fail?

    Has a customer's recurring payment already failed and is now overdue?

    Do you want to reduce the risk of non-payment by charging a specific amount in advance?

    Nadles lets you issue one-time charges of any amount, while automatically adjusting the customer’s next billing cycle to reflect those charges.
  </Accordion>

  <Accordion title="Combination of all the above" icon="circles-overlap">
    By combining different kinds of pricing and billing rules you can create complex pricing scenarios that fit your business model.
  </Accordion>
</AccordionGroup>