> ## Documentation Index
> Fetch the complete documentation index at: https://docs.1to1ai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 1TO1 AI Public API

> Integrate 1TO1 AI with your external systems through a REST API.

The **1TO1 AI Public API** lets your external systems —CRMs, n8n, your own
scripts— operate on your business's WhatsApp conversations: send messages,
add labels, assign AI employees, schedule messages and more.

## Features

<CardGroup cols={2}>
  <Card title="Pure REST" icon="code">
    The HTTP status is the success or error signal. A successful body is the
    payload itself, with no envelope.
  </Card>

  <Card title="API key auth" icon="key">
    Every request carries a Bearer token (`sk_1to1_...`) issued per business.
  </Card>

  <Card title="Multi-tenant" icon="building">
    Each API key is scoped to one business — it never accesses another's data.
  </Card>

  <Card title="Rate limit" icon="gauge">
    Two buckets of 60 requests/min per API key (general and messages).
  </Card>
</CardGroup>

## Get started

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/en/quickstart" horizontal>
    Authenticate your first request and send a WhatsApp message.
  </Card>

  <Card title="Authentication" icon="key" href="/en/authentication" horizontal>
    How to issue and use your API key.
  </Card>

  <Card title="Conversations" icon="comments" href="/en/conversations" horizontal>
    Identifiers and the 24h window.
  </Card>

  <Card title="Action group" icon="layer-group" href="/en/action-groups" horizontal>
    Up to 10 actions on a conversation in a single request.
  </Card>
</CardGroup>