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

# API Overview

> Char REST API for managing organizations, identity providers, skills, threads, usage analytics, and subscriptions

The Char API is a REST interface for managing organizations, identity provider configuration, end users, skills, threads, usage, and subscriptions.

## Base URL

<Snippet file="base-url.mdx" />

## Authentication

<Snippet file="auth-header.mdx" />

See [Authentication](/authentication) for details on tokens and org context.

## Resource Groups

The OpenAPI spec groups endpoints into the following categories:

* **Auth** (session logout)
* **Users** and **Organizations**
* **Identity Providers** (SSO config + test connection)
* **End Users**
* **Organization Skills**
* **Threads**
* **Usage Analytics**
* **Directories**
* **Plan Tiers**
* **Subscriptions**

## Request & Response Format

* All requests and responses use JSON.
* There is no global envelope; each endpoint returns its own schema.

## Pagination

Some list endpoints accept `limit` and `offset` (for example, `POST /organization-skills/list`). Always check the OpenAPI spec for the exact shape and defaults.

## OpenAPI Spec

* **Spec**: `https://app.usechar.ai/api/spec.json`
* **Docs**: `https://app.usechar.ai/api/docs`

<Snippet file="support-cta.mdx" />