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

# Introduction

> Every endpoint, grouped by what it does, with a live playground

This reference is generated straight from the live OpenAPI document — the same one the API, the MCP server, and the runtime validator all read from, so it can never disagree with what a call actually does.

<CardGroup cols={3}>
  <Card title="Catalog" icon="list">
    List, search, and read a tool's schema before you call it
  </Card>

  <Card title="Account" icon="user">
    Check your credit balance and usage
  </Card>

  <Card title="Tools" icon="wrench">
    Run any of 900+ tools
  </Card>
</CardGroup>

New to the API? Start with [Get started](/api/get-started) instead — this page assumes you already have a key.

Every request needs `Authorization: Bearer YOUR_API_KEY` — see [Authentication](/api/authentication).

Prefer testing in a client? [Fork the public Postman workspace](https://www.postman.com/theru-studio/io-tools/overview) and call the API without writing a request by hand.