CheckDigit

dev.workers.mike-tusa.checkdigit/checkdigitVersion 0.2.1

Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only.

Status

Responds171 msNov 14, 2026, 14:28 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:28 UTC
Latency: 171 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://checkdigit.mike-tusa.workers.dev/mcpResponds171 msNov 14, 2026, 14:28 UTC

No sign-in

Claude Code

claude mcp add --transport http checkdigit https://checkdigit.mike-tusa.workers.dev/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: checkdigit
Remote MCP server URL: https://checkdigit.mike-tusa.workers.dev/mcp

Cursor

{
  "mcpServers": {
    "checkdigit": {
      "url": "https://checkdigit.mike-tusa.workers.dev/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"checkdigit","type":"http","url":"https://checkdigit.mike-tusa.workers.dev/mcp"}'

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Tools

2 tools

Tools of CheckDigit
	Description		Read-only	Idempotent	Open world
`get_meta`Return the service version and build, supported IBAN and VAT countries, GTIN formats, the disclaimer and the current limits. Does not count as a check. Read-only. Same data as GET /v1/meta.	Return the service version and build, supported IBAN and VAT countries, GTIN formats, the disclaimer and the current limits. Does not count as a check. Read-only. Same data as GET /v1/meta.	No	Yes	Yes	No
`validate_code`Check the format and check digits of one identifier: IBAN (ISO 13616, per-country length and layout), BIC/SWIFT (ISO 9362 format and country), EU VAT number (offline checksum, VIES not queried), GTIN/EAN-8/UPC-A/EAN-13/GTIN-14 (GS1 mod 10) or ISBN-10/13. type "auto" (default) detects the type from the shape. Returns valid, a reason when invalid (e.g. the expected check digit), and normalized/formatted forms. Format check, not a compliance check: valid does not mean the account, registration or product exists. The code is sent in a POST body and not stored or logged. Read-only. Same engine, keys and limits as POST /v1/{type}.	Check the format and check digits of one identifier: IBAN (ISO 13616, per-country length and layout), BIC/SWIFT (ISO 9362 format and country), EU VAT number (offline checksum, VIES not queried), GTIN/EAN-8/UPC-A/EAN-13/GTIN-14 (GS1 mod 10) or ISBN-10/13. type "auto" (default) detects the type from the shape. Returns valid, a reason when invalid (e.g. the expected check digit), and normalized/formatted forms. Format check, not a compliance check: valid does not mean the account, registration or product exists. The code is sent in a POST body and not stored or logged. Read-only. Same engine, keys and limits as POST /v1/{type}.	No	Yes	Yes	No

Details

Registry status: Active
Published: Oct 15, 2026
Updated: Oct 15, 2026
Website: https://checkdigit.mike-tusa.workers.dev/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Invoicing and accounting E-commerceSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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