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

# Reference Guides

[localhost link]: http://localhost:3000/docs/4/fusion-ai/reference/overview

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-ai/reference/overview

[old doc.lw link]: https://doc.lucidworks.com/fusion-ai/4.2/506

* [API Reference](/docs/4/fusion-ai/reference/api/overview)
* [Index Pipeline Stages Reference](/docs/4/fusion-ai/reference/index-pipeline-stages/overview)
* [Query Pipeline Stages Reference](/docs/4/fusion-ai/reference/query-pipeline-stages/overview)
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