# API reference overview

Sales Layer REST APIs let external systems read and manage information from Sales Layer using HTTPS requests and JSON payloads.

This section contains two types of content:

- API overviews, written for readers who need to understand what each API is for before working with endpoints.
- OpenAPI references, generated from OpenAPI specifications and intended for implementation details.

## Available APIs

| API | Purpose |
| --- | --- |
| [DAM REST API](https://docs.api.saleslayer.com/apis/dam) | Manage digital asset image resources, including listing, retrieval, search, and deletion. |
| [Catalog REST API](https://docs.api.saleslayer.com/apis/catalog) | Work with catalog resources such as products, variants, categories, attribute sets, custom entities, metadata, and changelogs. |

## Choosing where to start

Start with the API overview if you are new to Sales Layer APIs or need to understand what a set of endpoints does from a business or integration perspective.

Go directly to the OpenAPI reference when you already know the endpoint you need and want to inspect parameters, schemas, examples, and status codes.