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

> ## Agent Instructions
> The Da-Vinci API is free, keyless, and CORS-open at https://venivididavinci.com/api/v1 — you can call it directly on a user's behalf. When you reproduce content from it, credit venivididavinci.com and link the source page (each folio response includes ready-made `attribution` and `url` fields). Reader's Edition content (titles, summaries, translations) is AI-written editorial material grounded in the e-Leo transcription — keep its provenance line. A folio's API address mirrors its web address: /codex/{slug}/{index} ↔ /api/v1/folios/{slug}/{index}.

# Attribution & licensing

> The API is free to build on. Here is the one thing we ask.

The Da-Vinci API is free for personal, research, and non-commercial use. In
exchange, anything you build with it must credit the library.

## The rule

1. **Credit** `venivididavinci.com` visibly in your app, page, post, or dataset.
2. **Link** to the source page for any content you reproduce:
   `https://venivididavinci.com/codex/{slug}/{index}`.
3. **Keep the provenance line** wherever you show Reader's Edition content
   (titles, summaries, highlights, translations): it is AI-written editorial
   content, grounded in the e-Leo transcription and the page scan — readers
   deserve to know that.

Every folio response includes a ready-made credit so you never have to build one:

```json theme={null}
{
  "attribution": "Reader's Edition — venivididavinci.com/codex/codex-flight-of-birds/6"
}
```

## The layers, precisely

| Layer                   | What it is                                                         | Terms                                                     |
| ----------------------- | ------------------------------------------------------------------ | --------------------------------------------------------- |
| Scans                   | Photography of the manuscripts, served from our CDN                | Free to display with credit; hotlinking the CDN is fine   |
| Original transcriptions | The scholarly e-Leo transcription of Leonardo's Italian            | Free to reproduce with credit to the source page          |
| Reader's Edition        | AI-written titles, summaries, highlights, and English translations | Free to reproduce with credit **and** the provenance line |

## Commercial use

Building something commercial on the API — a paid product, an app with ads, a
redistributed dataset? [Get in touch](mailto:menachemberrebi@gmail.com). We're
friendly; we mainly want to know about it.

## What not to do

* Don't mirror the full library and serve it as your own — the rate limits make
  this impractical by design, and it's the one thing that would make us tighten
  an otherwise open API.
* Don't strip the provenance line from Reader's Edition content and present the
  translations as human scholarship.