Registry
Data sources
Nartmad only queries sources whose terms permit it. Nothing here is scraped behind a login, and every record shown in a report links back to its origin.
| Source | Kind | Access | Licence | Coverage | Cached | Status |
|---|---|---|---|---|---|---|
Europeana https://api.europeana.eu/record/v2 | aggregator | API key | Mixed, per provider | ~50m records from European institutions | 0 | live |
Vision & OCR analysis | ai | Lovable AI Gateway | n/a | Image understanding, signature & label OCR | 0 | live |
Auction results | auction | Web research (Firecrawl + AI) | Public listings only | Published auction house results | 0 | disabled |
Wikidata https://www.wikidata.org/w | authority | SPARQL / wbsearchentities | CC0 | Artists, institutions, identifiers | 0 | live |
Harvard Art Museums https://api.harvardartmuseums.org | museum | API key | Mixed | ~250,000 objects | 0 | live |
Rijksmuseum https://www.rijksmuseum.nl/api/en | museum | API key | Public domain imagery | ~800,000 objects | 0 | live |
Smithsonian Open Access https://api.si.edu/openaccess/api/v1.0 | museum | API key (api.data.gov) | CC0 subset | ~11m records across 19 museums | 0 | live |
Victoria & Albert Museum https://api.vam.ac.uk/v2 | museum | Open API (no key) | Mixed / CC BY-NC | ~1.2m object records | 0 | live |
Art Institute of Chicago https://api.artic.edu/api/v1 | museum | Open API (no key) | CC0 metadata | ~120,000 objects | 0 | live |
Cleveland Museum of Art https://openaccess-api.clevelandart.org/api | museum | Open API (no key) | CC0 metadata | ~63,000 objects | 0 | live |
The Metropolitan Museum of Art https://collectionapi.metmuseum.org/public/collection/v1 | museum | Open API (no key) | CC0 metadata | ~490,000 objects, 5,000 years | 0 | live |
Not connected
Auction price data
Hammer prices and comparables from Christie's, Sotheby's, Phillips and the aggregators are licensed products. Until a licensed feed is connected, Nartmad shows museum comparables only and states plainly that no price evidence exists — it will not estimate a value it cannot cite.