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

# Getting Started

> Learn how to completely automate your financial operations

The Sequence API lets developers securely manage and automate all of the financial operations of your company.

The API is based on REST, and uses standard REST features such as resource-based endpoints, HTTP verbs, standard responses and authentication.

We have 2 environments - Production and Sandbox.

<Card title="Authentication" icon="key" href="/reference/authentication">
  Once you've set up your account you'll be able to authenticate your requests.
</Card>

<CardGroup>
  <Card title="Create a usage metric" icon="ruler" href="/reference/latest/usage/create-a-new-usage-metric">
    Define the metric that provides your customers with value.
  </Card>

  <Card title="Add a usage event" icon="chart-simple" href="/reference/latest/usage/create-a-new-usage-event">
    Stream the usage events to Sequence to be calculated real time.
  </Card>
</CardGroup>