A Model Context Protocol (MCP) server for validating and parsing CUSIP and ISIN security identifiers using check digit algorithms.
CUSIP/ISIN Validator — Security Identifier Validation is an MCP project maintained in the easysolutions906/cusip-api repository. The maintainer describes its purpose as “A Model Context Protocol (MCP) server for validating and parsing CUSIP and ISIN security identifiers using check digit algorithms”. Read the project documentation for the complete scope.
The documented npm package is @easysolutions906/mcp-cusip-isin. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| cusip_validate | Validate a 9-character CUSIP using the Luhn-variant check digit algorithm |
| cusip_parse | Parse a CUSIP into issuer code, issue number, and check digit |
| isin_validate | Validate a 12-character ISIN using the Luhn algorithm |
| isin_parse | Parse an ISIN into country code, NSIN, and check digit (extracts embedded CUSIP for US/CA) |
{
"mcpServers": {
"cusip-isin": {
"command": "npx",
"args": [
"-y",
"@easysolutions906/mcp-cusip-isin"
]
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
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