> ## Documentation Index
> Fetch the complete documentation index at: https://cinch-api.crex.page/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Using CREX's API to retrieve product emissions or estimate emission for your Order

## Setting up

The first step to world-class documentation is setting up your editing environments.

<CardGroup cols={2}>
  <Card title="Authentication" icon="shield-check" href="/authentication">
    Authenticate with our calculations API to get started
  </Card>

  <Card title="API Reference" icon="cloud-binary" href="/api-reference/introduction">
    Explore the list of APIs that we provide
  </Card>
</CardGroup>

## Tutorials

Detailed tutorials with examples that show how you can use our API to calculate emission.

<CardGroup cols={2}>
  <Card title="Calculate order emission" icon="fire-smoke" href="/tutorials/order-emissions">
    Calculate order emission
  </Card>

  <Card title="Retrieve product emission" icon="building-columns" href="/tutorials/product-emissions">
    Retrieve product emission
  </Card>
</CardGroup>