API implementation and reference

---
title: API implementation and reference
description: Get started using ServiceNow APIs with guides, resources, and reference documentation.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/api-reference/api-implementation-reference.html
release: brazil
topic_type: concept
last_updated: "2026-09-10"
reading_time_minutes: 1
---

# API implementation and reference

Get started using ServiceNow APIs with guides, resources, and reference documentation.

<table id="table_api_tiles" class="nav-card"><tbody><tr><td>

[API implementation \[Omitted image "bus-integration-and-apis.svg"\] Alt text: Set up Web Services to access ServiceNow APIs.](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/api-reference/api-implementation.md)

</td><td>

[API reference \[Omitted image "bus-learn.svg"\] Alt text: Find reference documentation for Client, Server, and REST APIs.](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/api-reference/api-reference.md)

</td><td>

[Developer guides \[Omitted image "bus-application-developer.svg"\] Alt text: Explore program resources for learning, building, and developing.](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/brazil/markdown/api-reference/developer-guides/developer-guides.md)

</td></tr></tbody>
</table>## API implementation

Use web services to connect ServiceNow applications to other software applications.

This section includes information on the following:

-   Useful server-side scripts for implementing functionality that is not available in the core system.
-   Details on how to debug scripts
-   Client scripting techniques and use cases, such as messages.
-   Use web services to connect ServiceNow applications to other software applications.

## API reference

Explore ServiceNow APIs that you can use to change functionalities and add features on the ServiceNow AI Platform.

This section includes references for the following:

-   Client JavaScript APIs to control how the ServiceNow AI Platform functions and is displayed within the web browser.
-   Server-side JavaScript APIs to modify and develop applications.
-   REST APIs to access and update data on the ServiceNow AI Platform.

## Developer guides

Set up or extend API configuration on the ServiceNow AI Platform for a ServiceNow product or API.