# PageIndex

> PageIndex (MIT, Python) is VectifyAI’s vectorless, reasoning-based RAG engine. First-party pitch: build a hierarchical tree index per document, then let an LLM reason through that tree (human-like section navigation) instead of embedding chunks into a vector database.

- Slug: pageindex
- Record: cmp_pageindex
- Kind: app
- Functions: index, reason, embed, memory, retrieve
- Score: 12
- Observed sample: This component is not in Leyline's observed sample.

JSON: https://staging.leyline.ahensya.com/api/v1/components/pageindex