checkdigit

active

Offline check-digit validation API + MCP server for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN.

Code-only MCP server: no hosted endpoint, so you install and run it yourself. It is not probed, graded or counted in our reachability statistics.

Get it

Run this server as a hosted endpoint? Submit the endpoint and it moves to the remote directory, where it is probed and graded.