# Introduction

> Bref Point Inbox is a REST API for connecting your customers' WhatsApp Business accounts, sending and receiving messages, and getting notified through signed webhooks.

Bref Point Inbox is a **messaging infrastructure for developers and software vendors**. It saves you from handling the complexity of Meta's WhatsApp Business platform yourself: customer onboarding, tokens, webhooks, queues, retries, cost tracking.

<Callout type="note" title="Independent product">
Bref Point Inbox is published by Labred Industry. It relies on Bref Point's Meta Tech Provider status, but is **neither published nor endorsed by Meta**.
</Callout>

## What you can do

- **Connect your customers' WhatsApp Business accounts** through Meta's Embedded Signup, including in coexistence mode (the customer keeps the WhatsApp Business app on their phone). [Guide](/docs/guides/connect-whatsapp)
- **Send messages**: text, images, documents, videos, audio, location, and templates. Sending is asynchronous, idempotent, and automatically retried after an outage. [Guide](/docs/guides/send-messages)
- **Receive messages and statuses** through signed webhooks: received, sent, delivered, read, failed. [Guide](/docs/guides/webhooks)
- **Manage templates**: submission to Meta, review tracking, explicit rejection before sending. [Guide](/docs/guides/templates)
- **Test without WhatsApp** using the sandbox and its simulator. [Guide](/docs/guides/sandbox)
- **Track usage**: by day, category, country, or number, with the Meta cost and the Bref Point fees always kept separate. [Guide](/docs/guides/usage-billing)

## The two rules to know before you start

<Callout type="warning" title="The 24-hour service window">
A free-form message (text, image…) is only accepted if the recipient has messaged you **within the last 24 hours**. Outside this window, only a **template approved by Meta** can be sent. The API rejects a send outside the window with the `outside_service_window` error.
</Callout>

<Callout type="note" title="Recipient consent">
WhatsApp requires that the person has agreed to receive your messages. This obligation is yours: Bref Point Inbox cannot verify it for you.
</Callout>

## Where to start

1. [Quickstart](/docs/quickstart): your first message in a few minutes, in the sandbox.
2. [Authentication and keys](/docs/authentication): API keys, scopes, environments.
3. [Concepts](/docs/concepts): accounts, apps, connected businesses, numbers, messages.

## Who pays Meta?

Meta bills the **WhatsApp Business account owner directly**, based on the message category and the recipient's country. Bref Point Inbox does not resell conversations: it bills its own fees (subscription, and a per-message fee beyond your plan's quota), always on a separate line. [Details](/docs/guides/usage-billing)

## For AI agents and tools

All the documentation is available as raw Markdown (add `.md` to a page's URL), in [`/llms.txt`](/llms.txt) and [`/llms-full.txt`](/llms-full.txt), and the OpenAPI specification is at [`/openapi.json`](/openapi.json). [Learn more](/docs/ai)