The REST API for valuing alternative assets — from vintage wines to venture equity, in under 30 seconds.
Recent Valuations
Under 30 seconds
Get defensible valuations faster than a coffee order. No appointments, no back-and-forth.
Full Transparency
Every valuation shows comparable sales, market analysis, and factor breakdowns. No black boxes.
P10-P90 Range
Know the full spectrum of outcomes. Get pessimistic, expected, and optimistic values in every report.
Integrate alternative asset valuations directly into your platform. One simple endpoint, comprehensive results.
Sub-30 second responses
Fast enough for real-time applications
API key authentication
Simple, secure access management
JSON in, JSON out
RESTful endpoints, no SDKs required
# Value any asset with a single request
curl -X POST https://api.impossival.com/v1/value \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"description": "1982 Château Lafite..."}'# Response
{
"estimate": 2850,
"range": { "p10": 2200, "p90": 3600 },
"confidence": 0.87,
"category": "WINE",
"reasoning": "...",
"factors": [...],
"market_research": {...}
}Production-ready React components. Fully themeable, responsive, and connected to our valuation engine.
Drop image or click (optional)
Provide a detailed description including condition, provenance, and specifications.
Vintage guitar classified as a collectible musical instrument based on year, condition, and market demand.
$28,500
Confidence
Agents
1982 Château Lafite Rothschild
Rolex Submariner 116610LN
1967 Ford Mustang Shelby GT500
Every valuation includes detailed breakdowns, market research, and analytics.
Try it yourselfAsset Valued
1982 Château Lafite Rothschild, 750ml
$2,850
Range: $2,200 – $3,600
Confidence
Consensus
4
AI Agents
92% agreement
Uncertainties
Valuation Breakdown
Market Research
Value Distribution
Plus: value projections, market timing, and more.
From fine wine to venture capital. Our valuation engine uses 24+ specialized frameworks tailored to each asset class.
Each framework incorporates domain-specific factors, market dynamics, and comparable sales data to deliver accurate, defensible valuations.
View all methodologiesWe continuously test our valuations against real market data and publish the results. No black boxes — just verifiable accuracy.
—
Median Error
Half of valuations are more accurate
—
Calibration Rate
Actual prices within predicted range
—
Precision Score
Tight ranges with good accuracy
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Assets Tested
Across 20+ categories
We benchmark against verified sales from auctions, dealers, and market databases.
Learn about our methodologyTraditional appraisals weren't built for the modern collector.
We're not replacing your appraiser — we're giving you a head start.
Everything you need to know about our valuations and how to use them.
Still have questions? Contact usOur valuations typically fall within 10-20% of professional appraisals and auction results. We continuously benchmark against real sale data and publish our accuracy metrics transparently. However, Impossival is designed for estimation purposes — for legal, insurance, or high-stakes transactions, we recommend supplementing with a certified appraiser.
We support 20+ asset categories including fine wine, art, watches, classic cars, rare books, memorabilia, vintage LEGO, jewelry, musical instruments, coins, stamps, and more. For income-generating assets, we cover commercial real estate, private ventures, royalties, and structured settlements. If you can describe it, we can value it.
We use 8 AI agents with different expertise and biases — from optimistic dealers to skeptical analysts. Each agent applies relevant valuation frameworks to your asset description, then we aggregate their estimates using robust statistical methods. This consensus approach reduces individual bias and provides more balanced valuations.
Most valuations complete in 15-45 seconds. Complex assets with detailed descriptions may take slightly longer as our agents perform deeper analysis. You'll see real-time progress as each agent contributes their assessment.
Yes. We don't store your asset descriptions after generating valuations unless you explicitly save them to your account. API requests are encrypted in transit, and we never share your data with third parties. See our Privacy Policy for full details.
Absolutely. Our REST API is designed for developers and businesses. Choose from flexible pricing tiers based on your volume. Check our API documentation for integration guides, SDKs, and rate limits.