About
MCP server: compute and verify the Luhn (mod-10) checksum.
README
MCP server: Luhn (mod-10) checksum tools. Used by credit cards, IMEIs, Canadian SIN, US NPI, and many other ID schemes. No deps.
Tools
verify—{ input: "4532015112830366" }→{ valid: true }checksum— compute the check digit for an input that lacks onecomplete— append the check digit
Spaces and dashes in input are ignored.
Configure
{ "mcpServers": { "luhn": { "command": "npx", "args": ["-y", "@mukundakatta/luhn-mcp"] } } }
License
MIT.
Installing Luhn
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/MukundaKatta/luhn-mcpFAQ
Is Luhn MCP free?
Yes, Luhn MCP is free — one-click install via Unyly at no cost.
Does Luhn need an API key?
No, Luhn runs without API keys or environment variables.
Is Luhn hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Luhn in Claude Desktop, Claude Code or Cursor?
Open Luhn on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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