One platform. Every coin. Every bill. Every error — known, rare, and brand new.
Here is everything working for you the moment you upload a photo.
Most tools only recognize errors they've been trained on. Error Hunter goes further. Our AI includes anomaly detection — a layer that flags patterns it has never seen before, including errors that have never been catalogued anywhere. If your coin or bill is off in any way, we will find it. Not just the classics. Not just the famous varieties. Everything.
From the most common doubled dies to ultra-rare transitional planchet errors — our AI was built to recognize the full universe of mint errors across coins from every country.
Paper currency errors are some of the rarest and most valuable finds in all of collecting. Error Hunter is trained on the full range of printing defects across US bills and international banknotes.
Error Hunter automatically checks every US currency serial number you enter against every recognized fancy pattern — and tells you what it's actually worth based on real 2024–2025 auction data.
All 8 digits identical. Roughly 1-in-11-million odds. On $1 bills: $500–$3,000+. On $100 bills: up to $30,000+. We detect every solid pattern instantly.
12345678 or 87654321 — one in ~96 million notes. We verify true ascending and descending ladders and surface real sold prices from Heritage Auctions.
Palindrome serials that read the same forward and back. Super radars are 100× rarer — a 2024 $5 Super Radar sold for $66,000 at Heritage Auctions.
First four digits all match, last four all match (e.g., 11112222). Circulated examples routinely sell for $80–$250.
First half repeats as second half. Super repeaters (12121212) and binary super repeaters (01010101) fetch $80–$400+.
Serial #1 has sold for over $26,400. Sub-100 serials in uncirculated condition reach $1,000+. We tell you exactly where your number falls.
Serial contains only 0s and 1s. Binary super repeaters (01010101) are among the most sought-after patterns, selling for $150–$400+.
Serial encodes a recognizable date or historical milestone. Historically significant dates (July 4 1776, 9/11, etc.) command strong collector premiums.
Replacement notes printed to replace defective bills. Low print-run star notes are increasingly rare and valuable. Ladder + star: up to 10× premium.
No other coin scanning tool does this. When our AI detects a potential wrong planchet, transitional error, or mule — we instantly surface a Weight Verification Tool right inside your results.
Enter your coin's weight from a jeweler's scale and we run three simultaneous checks to confirm or rule out the error.
Point your camera at any coin or bill and get real-time AI analysis on screen — no upload, no wait, no guessing. Built for high-volume hunters who move fast.
Live feed fed directly into the AI engine — results update as you move the coin in frame. No manual capture needed.
Designed for coin show buyers, estate sale hunters, and roll searchers who need instant decisions without breaking their workflow.
Stay in Live Scan mode for your entire session. Work through a roll, a bag, or a dealer tray without restarting the app.
We don't just hand you a confidence score and leave you guessing. Our decision intelligence layer cross-validates multiple AI engines and assigns a clear verdict to every scan — so you always know your next move.
All signals agree — no error detected. Safe to move on.
Something looks off. Check a second image or use the weight tool before deciding.
High probability error detected. Submit to PCGS or NGC before listing or selling.
Signals conflict. A better photo or physical inspection is recommended.
ErrorHunter LLC built a global-scale dataset covering coinage and currency from over 170 countries — not just the United States. This is not a US-only tool. It is a worldwide error-detection system built for international collectors and dealers.
3 free scans to get started. No card required. Unlock more when you're ready.
ErrorHunter LLC
Three free scans. No credit card. No commitment.
Just upload a photo and let the AI go to work.