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

# Overview

> API for public-facing environments such as the Quintus chat widget.

## What it is

This API was designed for conversational experiences exposed to end users. The main use case is the chat widget provided by Quintus, along with other public-facing scenarios enabled by the team.

## When to use it

* the Quintus chat widget;
* an agent on a landing page;
* support inside a mobile app;
* an assistant in a customer portal.

<Note>
  For enablement, configuration, and best practices in public environments, contact Quintus support.
</Note>

## How it works

1. Your backend creates the conversation with `X-API-Key`.
2. The API returns `conversation_id` and `session_token`.
3. The client uses `Authorization: Bearer <session_token>` for conversation calls.
4. When needed, the backend refreshes the token with the API key.

## Main resources

* Conversations: creation, retrieval, refresh, and termination.
* Messages: synchronous send, streaming, and history.
* Files: attachments per conversation.
* Feedback: experience rating at the end of the flow.