SerialHunt

Check US bill serial numbers

SerialHunt tells you whether a US bill is worth keeping, from the serial number printed on it. Give it a serial and it reads the note the way a collector would: the Federal Reserve Bank, the series (worked out from the serial when it can be), and every fancy pattern in the eight digits, such as a radar, repeater, ladder, solid, binary, birthday or low serial, each with its exact odds counted across all 100,000,000 possible serials.

What you can ask

Is star note A 032 12345 on a $1 Series 2017A rare?
Example path ·

MCP connector

Server URL: https://bigballi.com/SerialHunt/mcp
Login: None
Protocol: MCP 2026-07-28
Instructions: SerialHunt: US paper money serial numbers, checked against 18,355 printed star note stretches from government production figures (Series 1963 on). Use for one note (bank, series, patterns in the digits with exact odds, and a star note's print run and rarity), for the smallest star runs on record, for the 17 fancy serial patterns and their odds, and for which series the figures cover. A star note's scarcity is the size of its run: 640,000 notes or fewer is the line collectors use for a premium. The figures say what was printed; they are not prices, and nothing here judges whether a note is genuine.

Tools

Reads data4

Skills

1 in the ChatGPT listing

MCP connector

Server URL

https://bigballi.com/SerialHunt/mcp

None

Protocol

MCP 2026-07-28

Instructions

SerialHunt: US paper money serial numbers, checked against 18,355 printed star note stretches from government production figures (Series 1963 on). Use for one note (bank, series, patterns in the digits with exact odds, and a star note's print run and rarity), for the smallest star runs on record, for the 17 fancy serial patterns and their odds, and for which series the figures cover. A star note's scarcity is the size of its run: 640,000 notes or fewer is the line collectors use for a premium. The figures say what was printed; they are not prices, and nothing here judges whether a note is genuine.

Skills

1 in the ChatGPT listing