> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://www.comet.com/docs/opik/reference/rest-api/overview/llms.txt.

# Overview

The Rest API can be used with both the Open-Source platform and Opik Cloud. The main differences are related to the URL
to use and request headers used for authentication.

#### Open-Source

If you are using the Open-Source platform you can simply use the `http://localhost:5173/api/v1/<endpoint_path>`:

```bash
curl -X GET 'http://localhost:5173/api/v1/private/projects'
```

#### Opik Cloud

If you are using Opik Cloud or a on-premise installation of the Comet platform, you will need to specify the Opik
API Key and Opik Workspace in the header:

```bash
curl -X GET 'https://www.comet.com/opik/api/v1/private/projects' \
-H 'Accept: application/json' \
-H 'Comet-Workspace: <your-workspace-name>' \
-H 'authorization: <your-api-key>'
```

> **Warning**
>
> Note that the authorization header value does not include the `Bearer ` prefix.

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