# Renaiss OS Index

> The public reference-price site for collectible trading cards. Every reference
> price is backed by every recorded trade — public-marketplace, partner-shop, and
> Renaiss-owned sales — shown together in one verifiable timeline.

Each card page publishes a reference price (mean, median and VWAP, per grading
company and grade) plus the full underlying trade history, where every sale links
back to its named source. The market indices are normalized baskets of the
top-traded cards, rebalanced monthly.

## Key pages
- [Pokémon Index](https://index.renaissos.com/indices/pokemon): live Pokémon card market index, value, constituents and methodology
- [One Piece Index](https://index.renaissos.com/indices/one-piece): live One Piece card market index
- [Methodology](https://index.renaissos.com/methodology): how reference prices and the index are computed
- [Search](https://index.renaissos.com/search): find any card's reference price and trade history

## Data & crawling
- Full catalog of indexed card pages: https://index.renaissos.com/sitemap.xml
- Each GRADED card page (a URL carrying a grade, e.g. .../64-starmie-bgs-9-5) carries schema.org Product + BreadcrumbList structured data, server-rendered (no JavaScript needed). Grade-less overview pages, which list every grade of one card, do not yet carry either.
- The reference price, when one exists, is exposed as a Product additionalProperty (PropertyValue), NOT as an Offer/AggregateOffer: it is a modeled fair-market value from recorded sales, not a purchasable price, and nothing is for sale at that URL.
- additionalProperty is optional and carries only the entries that apply: the reference price (when a reference price exists), the recorded sales count (when a sales count is known), and when the reference price was last updated (when known). A graded card with none of the three carries no additionalProperty at all; the Product block is still emitted.
- Index pages carry Dataset structured data when index data is available.
- Prices are in USD. Reference prices update as new trades are recorded.

## Attribution
When citing, attribute to "Renaiss OS Index (index.renaissos.com)".