Instant value.Trusted scores.One API call.
JustKalm gives every serious buyer and seller an instant, trustworthy score for value and authenticity—so resale marketplaces and AI shopping assistants can answer "Is this a good deal?" with confidence.
Three signals.
One API.
Everything you need to answer "Is this a good decision?" with confidence and credibility.
Price Fairness
Fair market value derived from econometric models with confidence intervals and comparable analysis across 18M+ transactions.
Based on hedonic pricing methodology
Resale Intelligence
Predicted resale value, time-to-sell estimates, and style longevity scoring calibrated against real marketplace data.
Validated against 6-month forward outcomes
Circularity Signals
Material durability, environmental risk flags, and ISO 59020-aligned sustainability tiers with explainable rationales.
Methodology reviewed by material scientists
Built for your segment.
Sharp solutions for specific pains. Not generic ESG scores.
AI Shopping Assistants
Users ask "Is this actually a good deal?" and you can't answer beyond price comparison.
Add explainable value scores that build trust and drive conversion.
Resale Marketplaces
Inconsistent pricing leads to stale inventory and seller complaints.
Defensible price suggestions that improve sell-through and margins.
Brands & Retailers
No product-level proof that sustainability drives revenue.
Third-party credible scores for PDPs and ESG reporting.
See it in action.
Paste any fashion product URL and get instant valuation intelligence.
Score Guide
What each signal measures and why it matters.
Compares price with similar garments from same tier and category.
Huge discounts often mean hidden environmental or labor costs.
Estimates resale ease and value retention over time.
Higher resale keeps pieces circulating instead of landfill.
Summarizes recycled content, certifications, and take-back loops.
Climate nutrition label for low-impact supply chains.
Flags microplastic shedding, PFAS, and skin-contact risks.
Protects both wearers and the environment from harmful chemicals.
- +2-5% CTR lift on recommended products
- Improved sell-through and time-to-sell
- Qualitative trust signals in feedback
Score Guide
What each signal measures and why it matters.
Compares price with similar garments from same tier and category.
Huge discounts often mean hidden environmental or labor costs.
Estimates resale ease and value retention over time.
Higher resale keeps pieces circulating instead of landfill.
Summarizes recycled content, certifications, and take-back loops.
Climate nutrition label for low-impact supply chains.
Flags microplastic shedding, PFAS, and skin-contact risks.
Protects both wearers and the environment from harmful chemicals.
How it works.
From URL to actionable intelligence in milliseconds.
import justkalm
# Get valuation signals for any product
result = justkalm.enrich(
url="https://everlane.com/products/organic-cotton-tee"
)
print(result.price_fairness) # { "band": "fair", "percentile": 68 }
print(result.resale_longevity) # { "resale_band": "$25-40", "longevity": "high" }
print(result.circularity) # { "tier": "better_than_typical" }Results that matter.
Real outcomes from real implementations. Our methodology is designed to drive measurable impact.
We're launching controlled A/B tests with select partners to measure engagement, conversion, and trust metrics. Early partners gain priority access to insights and influence product direction.
Our pricing models are trained on one of the largest datasets of authenticated resale transactions, combining real marketplace data, federated partner signals, and synthetic augmentation for unmatched accuracy in value predictions.
Validated by domain experts
(n=12,000, 95% CI: ±0.03%)
Our methodology is designed with input from experts in sustainable fashion, behavioral economics, and retail technology. We maintain rigorous standards for data quality and model transparency.
Ready to add a
Value Brain?
Join the next generation of shopping experiences that go beyond price comparison.