> For the complete documentation index, see [llms.txt](https://openindexai.gitbook.io/openindex.ai-api-documentation-1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://openindexai.gitbook.io/openindex.ai-api-documentation-1/introduction.md).

# Introduction

## Welcome to the OpenIndex.ai API documentation

We are opening up our API to allow developers to build their RAG (retrieval augmented generation) stack in their own applications.

You can get your API key at the [OpenIndex Dashboard](https://www.openindex.ai/dashboard/keys) and just pass it as a bearer token in the `Authorization` HTTP header.

## Want to jump right in?

Go right ahead with our Quick Start to learn how to get started with few lines of code.

{% content-ref url="/pages/HFYWkNXmSvfnIbBv8FSH" %}
[Quick Start](/openindex.ai-api-documentation-1/quick-start.md)
{% endcontent-ref %}

## Want to deep dive?

See below our API reference with a list of all endpoints.

{% content-ref url="/pages/BwjgDFsw0Crj13etseQ5" %}
[API Reference](/openindex.ai-api-documentation-1/reference/api-reference.md)
{% endcontent-ref %}