Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@ekaone/mcp-tools Mask this credit card: 4532-1234-5678-9012"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Under Active Development
MCP (Model Context Protocol) server exposing @ekaone utility tools for AI-assisted data masking via stdio transport.
Tool | Package | Description |
|
| Masks credit/debit card numbers (PCI DSS compliant) |
|
| Masks email addresses for privacy protection |
Related MCP server: postgres-safe-mcp
Add this configuration to your MCP client:
{
"mcpServers": {
"masker": {
"command": "npx",
"args": [
"@ekaone/mcp-tools@latest"
]
}
}
}Add to your claude_desktop_config.json:
{
"mcpServers": {
"masker": {
"command": "npx",
"args": [
"@ekaone/mcp-tools@latest"
]
}
}
}Then just talk to Claude naturally:
"Hide all card numbers in this table"
"Mask the email john.doe@example.com"
"Show only last 4 digits of this card: 4532-1234-5678-9012"Once connected, you can use these commands:
Mask email addresses: "Can you mask this email: user@domain.com?"
Mask card numbers: "Please mask this credit card: 4532-1234-5678-9012"
Custom masking: "Mask this card showing only first 4 digits: 4532-1234-5678-9012"
mask_cardParameter | Type | Required | Default | Description |
|
| ✅ | — | Card number to mask |
|
| ❌ |
| Masking character |
|
| ❌ |
| Digits visible at start |
|
| ❌ |
| Digits visible at end |
Examples:
Input : "4532-1234-5678-9012"
Output: "************9012"
Input : "4532-1234-5678-9012", unmaskedStart: 4
Output: "4532********9012"
Input : "4532-1234-5678-9012", maskChar: "•"
Output: "••••••••••••9012"mask_emailParameter | Type | Required | Default | Description |
|
| ✅ | — | Email address to mask |
|
| ❌ |
| Masking character |
|
| ❌ |
| Characters visible at start |
|
| ❌ |
| Also mask the domain |
Examples:
Input : "john.doe@example.com"
Output: "jo******@example.com"
Input : "john.doe@example.com", visibleChars: 4
Output: "john**@example.com"
Input : "john.doe@example.com", maskDomain: true
Output: "jo******@e******.com"# Install dependencies
pnpm install
# Development with hot reload
pnpm dev
# Run tests
pnpm test
# Build for production
pnpm build
# Test the built package locally
pnpm startTest the MCP server locally:
# Build first
pnpm build
# Test stdio communication
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | node dist/index.js# Build and test before publishing
pnpm run prepublishOnly
# Publish to NPM
pnpm publishThis repository has two main branches:
stdio (current branch) - For stdio MCP client usage (this README)
HTTP/SSE - For HTTP/SSE endpoint deployment
MIT © Eka Prasetia
⭐ If this library helps you, please consider giving it a star on GitHub!
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