CheckDigit

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

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

2 shown · authentication unknown

• Service version, supported formats and limits

  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.

  Schema valid · SHA-256 7b26728b9104…

  View input schema

  {
    "type": "object",
    "properties": {},
    "additionalProperties": false
  }

• Validate an IBAN, BIC, EU VAT number, GTIN/EAN/UPC or ISBN

  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}.

  Schema valid · SHA-256 c88a593cd571…

  View input schema

  {
    "type": "object",
    "properties": {
      "code": {
        "type": "string",
        "description": "The identifier to check, e.g. \"DE89 3704 0044 0532 0130 00\", \"ATU13585627\", \"4006381333931\" or \"978-0-306-40615-7\". Spaces, hyphens and dots are ignored. Max 64 characters.",
        "minLength": 1,
        "maxLength": 64
      },
      "type": {
        "type": "string",
        "description": "auto (default), iban, bic, vat, gtin or isbn.",
        "enum": [
          "auto",
          "iban",
          "bic",
          "vat",
          "gtin",
          "isbn"
        ],
        "maxLength": 6
      }
    },
    "required": [
      "code"
    ],
    "additionalProperties": false
  }