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

# API overview

> Base URL, authentication, and how to navigate the API reference

## Authentication

All requests require an API key in the header:

```bash theme={null}
X-API-Key: YOUR_API_KEY
```

## Base URL

```
https://api.kapso.ai/meta/whatsapp/v24.0
```

## What this API covers

Use this API when you want Meta-compatible WhatsApp messaging endpoints with Kapso auth and storage-backed features.

* send messages, templates, media, reactions, and mark-as-read
* manage media uploads and downloads
* read conversations, contacts, and message history
* use the same `X-API-Key` across Kapso APIs

## Reference sections

Browse the endpoint groups in the API reference sidebar to jump straight to the resource you need.