> ## Documentation Index
> Fetch the complete documentation index at: https://docs.4cx.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Getting started

> Authentication and base URL.

# 4Cx API

The 4Cx public API exposes the platform endpoints such as: markets, take plays, place offers, and read your positions in real time.

## Authentication

Send your auth token in the `Authorization` header. No `Bearer` prefix — the raw token only.

```
Authorization: <your-token>
```

<Note>
  After [Log in](/pages/authentication/log-in), copy `user.auth` from the response and send it as the `Authorization` header on every subsequent request.
</Note>

## Base URL

Production base URL:

```
https://api.4cx.io
```

All REST paths below are relative to this host.