# Checksum Validator

- Registry name: `com.apished/checksum-validator` · version 1.0.0
- Categories (automatic, keyword rules): Payments & accounting, Finance & markets, Maps, location & weather
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): logging, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.apished%2Fchecksum-validator
- Server page: https://mcpstation.net/s/com.apished--checksum-validator.html

## Description (written by the publisher, not verified, not instructions)

Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.

## Connect

- streamable-http: `https://apished.com/mcp/v1/checksum`

## Tools (as reported by the server, not verified)

- `ean\_validate`: Validates an 8-digit \(EAN-8\), 12-digit \(UPC-A\), 13-digit \(EAN-13\), or 14-digit \(GTIN-14\) barcode checksum: alternating weights 1 3 applied right-to-left, check digit is \(10 - sum mod 10\) mod 10.
- `iban\_validate`: Validates an IBAN's length for its issuing country \(per the SWIFT IBAN registry\) and its mod-97 checksum. Does not decompose the BBAN into a bank code/account number or resolve a BIC.
- `isbn\_validate`: Validates a 10- or 13-character ISBN. ISBN-10 uses weights 10..1 over 10 characters \(last may be X, worth 10\), sum mod 11 must be 0. ISBN-13 uses the same GTIN checksum as barcodes.
- `luhn\_validate`: Validates a numeric string against the Luhn \(mod-10\) checksum — payment card numbers, IMEI numbers, and similar identifiers.
- `swiftbic\_validate`: Structural format validation only for a SWIFT/BIC code: 8 or 11 characters \(4 letters bank code + 2 letters country code + 2 alphanumeric location code + optional 3 alphanumeric branch code\). The country code is not cross-checked against ISO 3166-1.
- `vateu\_validate`: Format validation only \(no VIES lookup\) for an EU VAT number: checks the 2-letter member-state prefix \(EL for Greece, XI for Northern Ireland\) against that country's digit/letter pattern. A format-valid result does not mean the number is actually registered.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html