The valuation infrastructure behind modern resale.
Circulaire gives resellers, auction houses and insurers one platform for accurate valuations — delivered as a pricing API, issued as white-label certificates, and built into a full auction system.
- 6
- Asset categories valued
- 100+
- Market data sources
- <7s
- Average valuation time
- 3
- Ways to integrate
One platform, three products
Everything you need to value, certify and sell pre-owned goods.
Pricing Intelligence
Instant, market-backed valuations for any second-hand asset — by API or embeddable widget.
- AI image & text identification across watches, handbags, sneakers, trading cards and art
- Comparable listings with confidence ranges and percentile distribution
- Drop-in widget that captures valuation leads on your own site
Valuation Certificates
Professional, white-label proof of value your customers — and their insurers — can trust.
- Branded PDF certificates generated in seconds and delivered by email
- Comparables, market analysis and a documented confidence level
- White-label under your own brand, or issue under Circulaire
Auctions
Run your entire auction house — intake to payout — on your own branded domain.
- AI-assisted cataloguing and market estimates at intake
- Soft-close bidding, Stripe payments and consignor payouts
- Nordic VAT, margin-scheme and bookkeeping compliance built in
Why it compounds
One data flywheel powers all three products.
Most pricing tools guess from scraped listings. Circulaire learns from real sales. Auctions generate settled transactions, those transactions sharpen our pricing, and that pricing makes every certificate more credible.
- 01
Auctions
Every hammer price is a real, settled transaction.
- 02
Market data
Sales feed a proprietary resale pricing dataset.
- 03
Pricing
Models return accurate, current valuations.
- 04
Certificates
Valuations become trusted, shareable proof.
The more the platform is used, the more accurate it becomes — a moat that deepens with every sale.
Certificate of Valuation
Ref. CIR-2026-04821
Item
Rolex Datejust 116300
2015 · Box & papers · Excellent
Estimated market value
€7,400
Based on 34 comparable sales across 6 verified market sources.
Backed by real market data
Valuations your customers, and their insurers, will trust.
Every valuation is triangulated across the world's leading resale and auction marketplaces, then documented with a confidence level and the comparables behind it.
- Transparent comparables and percentile ranges on every result
- Regional pricing and multi-currency normalisation
- Confidence level and sample size on every valuation
Data sources include
Built for the trade
Wherever pre-owned value changes hands.
Resellers & consignment
Price inventory in seconds, win consignments with instant offers, and capture leads with an embeddable valuation widget.
Auction houses
Catalogue faster with AI, set better reserves with market estimates, and run intake-to-payout on your own branded domain.
Insurance & appraisal
Issue defensible valuation certificates with documented comparables and confidence levels for claims and underwriting.
Developers & platforms
Integrate valuations directly with a clean REST API, predictable pricing, and EU data residency.
For developers
A valuation API you can ship in an afternoon.
One authenticated request returns a market-backed value, a confidence range, and the comparables behind it. Or drop the hosted widget onto any page with a single script tag.
API access and full documentation are provided on request — tell us about your use case and we'll provision a key.
curl https://app.gocirculaire.com/api/products/search \
-H "Authorization: Bearer $CIRCULAIRE_API_KEY" \
-G --data-urlencode "query=Rolex Datejust 116300" \
--data-urlencode "currency=EUR"
{
"estimatedValue": 7400,
"range": { "min": 6200, "max": 8600 },
"confidence": "high",
"comparables": 34
}See Circulaire valuing your inventory.
Book a 30-minute demo and we'll run live valuations on your own products — pricing, certificates and auctions in one walkthrough.