SERVER

CheckDigit

Rank #161,212

smithery/mike-tusa/checkdigit

Validate IBANs, BICs (SWIFT codes), EU VAT numbers, GTIN/EAN/UPC barcodes and ISBNs offline: format and check digits, with auto-detection and the reason when a code fails. Free without a key at about 20 checks per minute per IP; an optional API key (free keys issued on request during early access) raises the limit. Format check, not a compliance check: it does not query VIES or any bank directory, so a valid result does not prove the account, VAT registration or product exists. Quick start: connect directly to https://checkdigit.mike-tusa.workers.dev/mcp (Streamable HTTP, no Smithery account needed).

Versions unknown

First listed

Oct 15, 2026

Last publish date

—

PURPOSE

What you can do with CheckDigit

CheckDigit is a Model Context Protocol (MCP) server. It ranks #161,212 of 162,202 active servers on MCP Toplist. CheckDigit is listed on Smithery; no version information is available from the registries that list it or from its repository. It was first listed on Oct 15, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. Its registry listings below are the authority on what it does.

CAPABILITIES AND LIMITATIONS

What CheckDigit can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. Check its registry listings below.

REQUIREMENTS

What you need before using CheckDigit

DeclaredRemote authHosted remote, sign-in declared

The hosted endpoint is declared as gated by authentication — connect via its URL and authenticate with the provider (OAuth flow or an API key/header, per its docs).

Declared by Smithery, last synced Oct 28, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

Hosted endpoint declared as requiring authentication.

INSTALLATION AND FIRST TASK

Connect CheckDigit and confirm it works

Remote · HTTP

claude mcp add --transport http checkdigit https://server.smithery.ai/mike-tusa/checkdigit/mcp

This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

[mcp_servers.checkdigit]
url = "https://server.smithery.ai/mike-tusa/checkdigit/mcp"

Add to ~/.codex/config.toml. This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

https://server.smithery.ai/mike-tusa/checkdigit/mcp

Settings → Connectors → “Add custom connector”, then paste this URL. This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

{
  "mcpServers": {
    "checkdigit": {
      "url": "https://server.smithery.ai/mike-tusa/checkdigit/mcp"
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

{
  "servers": {
    "checkdigit": {
      "type": "http",
      "url": "https://server.smithery.ai/mike-tusa/checkdigit/mcp"
    }
  }
}

Save as .vscode/mcp.json in your workspace. This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

{
  "mcpServers": {
    "checkdigit": {
      "serverUrl": "https://server.smithery.ai/mike-tusa/checkdigit/mcp"
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. This endpoint requires authentication — see the server’s docs for credentials.

Remote · HTTP

{
  "mcpServers": {
    "checkdigit": {
      "url": "https://server.smithery.ai/mike-tusa/checkdigit/mcp"
    }
  }
}

This endpoint requires authentication — see the server’s docs for credentials.

First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Oct 15, 2026
Version history: Unavailable — no registry exposes versions and no release tags were found
Requirements evidence: Declared by Smithery, last synced Oct 28, 2026. Not independently verified by MCP Toplist.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 28, 2026

Registry sightings

Smithery ↗listed since Oct 28, 2026 · still listed

Do you maintain CheckDigit? to correct or enrich this profile.

VERSIONS

Version information unavailable

The registry that lists this server does not expose version metadata, and no release tags were found on the linked repository. MCP Toplist cannot say how, or whether, this server is versioned.

STANDING

#161,212of 162,202 active servers

Ranks ahead of 990 of 162,202 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/smithery%2Fmike-tusa%2Fcheckdigit.svg)](https://mcptoplist.com/server/smithery%2Fmike-tusa%2Fcheckdigit)

HTML

<a href="https://mcptoplist.com/server/smithery%2Fmike-tusa%2Fcheckdigit"><img src="https://mcptoplist.com/badge/smithery%2Fmike-tusa%2Fcheckdigit.svg" alt="MCP Toplist: #161,212 of 162,202" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Is CheckDigit listed on the Official MCP Registry?: CheckDigit is not on the Official MCP Registry. It is listed on Smithery.
How many versions does CheckDigit have?: Version information is unavailable for CheckDigit: no registry that lists it exposes version metadata, and no release tags were found on its repository.

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