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Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only.
CheckDigit is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 100/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding CheckDigit to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add dev.workers.mike-tusa.checkdigit/checkdigit https://checkdigit.mike-tusa.workers.dev/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-15T02:18:05.992681Z",
"publishedAt": "2026-10-15T02:18:05.992681Z",
"statusChangedAt": "2026-10-15T02:18:05.992681Z"
}
},
"server": {
"name": "dev.workers.mike-tusa.checkdigit/checkdigit",
"title": "CheckDigit",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://checkdigit.mike-tusa.workers.dev/mcp",
"type": "streamable-http",
"headers": [
{
"name": "Authorization",
"isSecret": true,
"description": "Optional. 'Bearer <key>' for higher limits. Works without a key."
}
]
}
],
"version": "0.2.1",
"websiteUrl": "https://checkdigit.mike-tusa.workers.dev/",
"description": "Offline check-digit validation for IBAN, BIC, EU VAT, GTIN/EAN/UPC and ISBN. Format check only."
}
}