# API Reference

For more information, see the [Checkout Overview](/online-payments/checkout/integration-guide.md) and the [Checkout Integration Guide](/online-payments/checkout/integration-guide.md).

{% content-ref url="/pages/17bb8de4509528120d8cb13cbfdfdc5f12e7569b" %}
[Orders](/online-payments/checkout/api-reference/orders.md)
{% endcontent-ref %}

{% content-ref url="/pages/0798a38a2031f31e0aff468fb07e7a1f136c041e" %}
[Trackers](/online-payments/checkout/api-reference/trackers.md)
{% endcontent-ref %}

{% hint style="warning" %}

## Note from GitBook: Demo content

This page contains some demo content meant to give a good impression of how your docs could work.

**These are the most important pages** that have been built in accordance with the brief by PayPal:

* [Agent Toolkit & MCP Server](https://paypal.gitbook.com/agent-toolkit-and-mcp-server/)
  * [Agent Toolkit](/agent-toolkit-and-mcp-server/agent-toolkit/quickstart.md)
  * [MCP Server](/agent-toolkit-and-mcp-server/mcp-server/set-up-a-local-mcp-server.md)
* [Checkout](/online-payments/checkout/integration-guide.md)
  * [Integration Guide](/online-payments/checkout/integration-guide.md)
  * [JavaScript SDK Reference](/online-payments/checkout/javascript-sdk-reference.md)
* [Invoicing](/online-payments/invoicing/integration-guide.md)
  * [Integration Guide](/online-payments/invoicing/integration-guide.md)
  * [API Reference](/online-payments/invoicing/api-reference.md)
    {% endhint %}


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