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

# Introduction

> SmartLead API documentation — automate cold email campaigns, manage leads, rotate email accounts, and track performance programmatically

## Welcome to SmartLead API

SmartLead is a powerful cold email outreach platform that helps you scale your email campaigns with advanced features like:

* **Multi-account rotation**: Send from multiple email accounts to maximize deliverability
* **Email warmup**: Automatically warm up new email accounts to build sender reputation
* **Unified inbox**: Manage all responses from one centralized location
* **Advanced analytics**: Track opens, clicks, replies, and more
* **Webhook integrations**: Connect to your CRM and other tools
* **Lead management**: Organize and categorize your prospects

## Getting Started

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Get your API key and make your first request in minutes
  </Card>

  <Card title="API Reference" icon="book" href="/api-reference/campaigns/get-all">
    Explore our comprehensive API documentation
  </Card>

  <Card title="Authentication" icon="key" href="/authentication">
    Learn how to authenticate your API requests
  </Card>

  <Card title="Webhooks" icon="webhook" href="/core/webhooks">
    Set up real-time notifications for campaign events
  </Card>
</CardGroup>

## Core Features

### Campaign Management

Create and manage email campaigns with multiple sequences, A/B testing, and advanced scheduling options.

### Email Account Rotation

Add multiple email accounts (SMTP, Gmail, Outlook) and let SmartLead rotate them automatically to maximize deliverability.

### Intelligent Warmup

Our AI-powered warmup system gradually increases your sending volume while maintaining high deliverability rates.

### Unified Inbox

Manage all replies from all campaigns in one place, with AI-powered categorization and response suggestions.

## API Versions

We offer two API versions:

* **V1 API** (Recommended): `/api/v1/...` - Latest version with all features
* **Legacy API**: `/api/...` - Maintained for backward compatibility

<Note>
  We recommend using V1 API for all new integrations. The V1 API offers better performance, more features, and improved response formats.
</Note>

## Base URL

All API requests should be made to:

```
https://server.smartlead.ai/api
```

For V1 endpoints:

```
https://server.smartlead.ai/api/v1
```

## Authentication

SmartLead API uses API keys for authentication. You can generate your API key from your dashboard settings.

```bash theme={null}
curl -X GET "https://server.smartlead.ai/api/v1/campaigns/?api_key=YOUR_API_KEY"
```

## Rate Limits

Rate limits vary by subscription plan. Please contact customer support.

<Warning>
  If you exceed your rate limit, you'll receive a 429 status code. Implement exponential backoff to handle rate limits gracefully.
</Warning>

## Support

Need help? We're here for you:

* **Email**: [support@smartlead.ai](mailto:support@smartlead.ai)

## What's Next?

<CardGroup cols={2}>
  <Card title="Create Your First Campaign" icon="paper-plane" href="/guides/campaign-setup">
    Learn how to set up your first email campaign
  </Card>

  <Card title="Set Up Email Accounts" icon="envelope" href="/guides/email-warmup">
    Add and configure your sending email accounts
  </Card>
</CardGroup>