What are reliable alternatives to CheckDigit?

Measured by Faceabot as working: Check Digit Validator.

How do I connect an AI agent to CheckDigit?

Use the MCP streamable HTTP endpoint https://checkdigit.mike-tusa.workers.dev/mcp.

Catalog › dev.workers.mike-tusa.checkdigit/checkdigit

Is CheckDigit reliable?

Reliable (measured) Yes. Faceabot measured CheckDigit 14 times: 100% of checks succeeded, including the last 14 in a row (last check 2026-10-19 18:25 UTC). It also does the job: its real read-only task worked 14 of 14 times.

Last check: 2026-10-19 18:25 UTC · answered in 6634 ms · remote (no install)

En français : Fiable (mesuré). Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

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

Source: official MCP registry (registry.modelcontextprotocol.io) · version 0.2.1 · publisher website

Connect your agent

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

Or ask Faceabot first: MCP tool check_reliability {"id":"dev.workers.mike-tusa.checkdigit/checkdigit"} on https://faceabot.com/api/mcp.

Does it actually do the job?

Does the job (tested) — Faceabot asked get_meta to do a small read-only task 14 time(s): 14 returned a real result, the last 14 in a row. Last result: ok in 3780 ms.

Sample input: {}. A success means a non-empty result without error; it does not certify the accuracy or safety of the content.

Other proven tools for the same job

Check Digit Validator Reliable (measured) · 100%
Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit · https://check-digit.gumballtools.com/api/mcp

Picked from Faceabot's live measurements. Or let Faceabot choose: GET https://faceabot.com/resolve?need=…

Faceabot measurements

When	Answers	Real task	Latency
2026-10-19 18:25 UTC	✅ ok	✅ done	6634 ms
2026-10-19 04:35 UTC	✅ ok	✅ done	7598 ms
2026-10-18 12:35 UTC	✅ ok	✅ done	5481 ms
2026-10-18 03:10 UTC	✅ ok	✅ done	4749 ms
2026-10-17 19:10 UTC	✅ ok	✅ done	4984 ms
2026-10-17 10:50 UTC	✅ ok	✅ done	4784 ms
2026-10-17 03:05 UTC	✅ ok	✅ done	5076 ms
2026-10-16 19:25 UTC	✅ ok	✅ done	6724 ms
2026-10-16 12:20 UTC	✅ ok	✅ done	9562 ms
2026-10-16 05:25 UTC	✅ ok	✅ done	7165 ms
2026-10-15 22:35 UTC	✅ ok	✅ done	4640 ms
2026-10-15 15:36 UTC	✅ ok	✅ done	7497 ms
2026-10-15 09:01 UTC	✅ ok	✅ done	3946 ms
2026-10-15 02:30 UTC	✅ ok	✅ done	3188 ms

Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

Find tools similar to CheckDigit →

Publisher of CheckDigit?

Show your measured reliability on your README or website:

[![Measured by Faceabot](https://faceabot.com/badge/dev.workers.mike-tusa.checkdigit/checkdigit.svg)](https://faceabot.com/tools/dev.workers.mike-tusa.checkdigit/checkdigit)

Data in JSON: /api/catalog?id=dev.workers.mike-tusa.checkdigit/checkdigit · Stop probes: POST /api/reliability/opt-out

AI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt

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