Check Digit Validator for VS Code

com.gumballtools/check-digit

Validates IBAN/ISBN/EAN/Luhn checksums and finds the one wrong digit

client:VS Code transport:streamable-http tools:1

Install Check Digit Validator in VS Code

.vscode/mcp.json

{
  "servers": {
    "check-digit": {
      "type": "http",
      "url": "https://check-digit.gumballtools.com/api/mcp"
    }
  }
}

Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs