uncrack · Green Bean Auction Platform2 auctions coming up

Discover the value. Before the first bid.

See the hidden potential in every green bean, through data.
Know each lot and bid with confidence.

Selling green beans? Join as a seller

Example lot

Lot LG-01 · El Pino

Geisha · Washed · Francisco Morazán

Taste potential · 0–10

  • Acidity8.2
  • Aroma3.3
  • Flavor6.8
  • Sweetness5.3
  • Mouthfeel3.0

Five taste scores, 0–10, predicted from the chemistry. Not a cupping score.

Acidity 8.2Aroma3.3Flavor 6.8Sweetness 5.3Mouthfeel3.0
This lotLibrary average

The shape shows where a lot leans before you ever cup it.

16 componentsThis lotLibrary average
.48
.84
.48
Acidity
.62
.86
.24
Aroma
.65
.78
.41
.81
Sweetness
.33
.14
Body
.38
.61
.75
Bitterness
.36
Stability
  • Trigonelline 0.24, the library average 0.32
  • Mono sugar 0.81, the library average 0.64
  • Glucose 0.78, the library average 0.63
  • Fructose 0.41, the library average 0.46
  • Sucrose 0.65, the library average 0.57
  • Poly sugar 0.14, the library average 0.17
  • Organic acids 0.48, the library average 0.35
  • Citric acids 0.84, the library average 0.74
  • Malic acids 0.48, the library average 0.47
  • Chlorogenic acids 0.75, the library average 0.59
  • Amino acids 0.62, the library average 0.59
  • Caffeine 0.38, the library average 0.46
  • Caffeine sub 0.61, the library average 0.57
  • Lipids 0.33, the library average 0.41
  • Diterpene 0.86, the library average 0.70
  • Water activity 0.36, the library average 0.43

What's inside the green bean, in six groups. Each bar is one component.

91%TUS

TUS uniformity 91%

Bean-to-bean, from 96 readings (3 scans × 32)

Water activity · 0–1
0.36
Chemical components
16

Higher means more uniform, and a uniform lot roasts more predictably.

Why bid on uncrack

Great coffee shouldn't go undiscovered.

Every lot is measured before the auction opens. The uncrack engine turns that reading into chemistry and taste potential, so you compare lots on evidence, not labels.

  • Scan

    See inside the bean,
    without roasting it.

    96 readings across 3 scans, about 156,000 raw signals per scan. Nothing roasted, nothing consumed.

  • Chemistry

    Shortlist before
    the samples arrive.

    16 chemical components, including sugars, acids, lipids and water activity.

  • Taste potential

    Compare lots side
    by side, not by label.

    5 taste axes scored 0–10: acidity, aroma, flavor, sweetness and mouthfeel.

  • Uniformity

    Know how
    consistent the lot is.

    The TUS score shows bean-to-bean consistency, added to the lot page once measured.

How to read the data

How an auction works

From sample box to settlement.

  1. Step 1

    Discover the coffee

    Discover hidden gems from around the world. Roast and taste a sample of every lot before you bid. Sample boxes are available in limited quantities.

    Order a sample box

  2. Step 2

    See the value

    Explore each lot’s component data and taste potential. Use the data alongside your tasting notes to compare lots and decide which coffees to bid on.

  3. Step 3

    Place your bid

    Follow a shared countdown and place your bids using an anonymous bidder ID. A last-minute bid adds five minutes to the auction.

  4. Step 4

    Get connected

    If you win a lot, we connect you with the producer through their official exporter. uncrack issues your invoice. Check each auction’s announcements for payment and shipping details.

Before you bid

Questions buyers ask

How do sample boxes work?

Check the coffee yourself before you bid: 150 g of green coffee from every lot in the auction, at US$180 per box with shipping included. Boxes are limited, so requests are served first come, first served, with a waitlist once they run out.

uncrack never takes payment. The auction presenter sends your payment request through uncrack, and genuine links always start with uncrack.auction/pay/

Order a sample box

Who ships the coffee to me?

Each winning bid settles directly with the origin’s official exporter, who ships your coffee. Shipping terms are agreed with the exporter.

How settlement works

Is there a minimum bid or lot size?

Both vary by auction. Every lot within an auction shares the same starting price, and you’ll see it on the lots once the auction opens. For the Honduras auctions, lots range from 15 kg up to around 120–130 kg.

Too much for a micro-roastery?Team up with other roasters and bid on a lot together. One roaster places bids on behalf of the group.

Can I cancel a bid?

No. Every bid you place goes through a confirmation. Once confirmed, it can’t be cancelled or changed. The one exception is an obvious error, such as a misplaced decimal point: tell the house before the auction closes, and it may cancel the bid if that is fair to other bidders.

How bidding works

Before you bid

Questions buyers ask

How do sample boxes work?

Check the coffee yourself before you bid: 150 g of green coffee from every lot in the auction, at US$180 per box with shipping included. Boxes are limited, so requests are served first come, first served, with a waitlist once they run out.

uncrack never takes payment. The auction presenter sends your payment request through uncrack, and genuine links always start with uncrack.auction/pay/

Order a sample box

Who ships the coffee to me?

Each winning bid settles directly with the origin’s official exporter, who ships your coffee. Shipping terms are agreed with the exporter.

How settlement works

Is there a minimum bid or lot size?

Both vary by auction. Every lot within an auction shares the same starting price, and you’ll see it on the lots once the auction opens. For the Honduras auctions, lots range from 15 kg up to around 120–130 kg.

Too much for a micro-roastery?Team up with other roasters and bid on a lot together. One roaster places bids on behalf of the group.

Can I cancel a bid?

No. Every bid you place goes through a confirmation. Once confirmed, it can’t be cancelled or changed. The one exception is an obvious error, such as a misplaced decimal point: tell the house before the auction closes, and it may cancel the bid if that is fair to other bidders.

How bidding works

See all questions

uncrack auction by EGGSTONE

Value, revealed. Potential, unlocked.

Read the evidence. Find your lot. Place your bid.

  • Evidence on every lot
  • Anonymous paddles
  • Anti-snipe close
  • Direct settlement