> ## Documentation Index
> Fetch the complete documentation index at: https://docs.contactswing.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> ContactSwing API documentation for external endpoints

## Welcome

<Card title="ContactSwing API Endpoints" icon="phone" href="/api-reference/endpoint/get">
  View the ContactSwing OpenAPI specification file
</Card>

## Base URL

All API requests should be made to the following base URL:

```
https://api.contactswing.ai
```

**Example endpoint:**

```
https://api.contactswing.ai/v2/_actions
```

## Authentication

All API endpoints are authenticated using a Workspace API key, provided in the `X-Workspace-Key` header. This is defined in the OpenAPI specification as an API key security scheme.

```json theme={null}
"security": [
  {
    "WorkspaceAuth": []
  }
]
```

The header must be included in every request:

```http theme={null}
X-Workspace-Key: <your-workspace-api-key>
```