80trust / 100

Check Digit Validator

by check-digit.gumballtools.com in Other

MCP serverPassing, checked 3 h ago

Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit

https://check-digit.gumballtools.com/api/mcp

Reliability

All checks passedSome failedAll failedNot checked

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "check-digit-validator": {
      "type": "http",
      "url": "https://check-digit.gumballtools.com/api/mcp"
    }
  }
}

run
Validate the check digit(s) on an IBAN, ISBN-10, ISBN-13, EAN-13, UPC-A, or Luhn-checked card number, and when it fails, try to say which digit is wrong. Use this instead of computing the checksum yourself. Mod-97 arithmetic on a rearranged 15-34 character IBAN, or a weighted…

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

When	Result	HTTP	Time
3 h ago	Passed	200	1.0 s
13 h ago	Passed	200	1.2 s
21 h ago	Passed	200	984 ms
29 h ago	Passed	200	942 ms
40 h ago	Passed	200	1.0 s

Show 10 older checks

Availability (30-day uptime)		35 / 35
Response time		5 / 15
Security scan		20 / 20
Transparency (repo, homepage, docs)		15 / 15
Recently checked		5 / 5
Verified owner		0 / 10

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Trust score

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MCP scan grade

From the findings of our latest check. It links to them.

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