LegacyShield Now Speaks MCP: Any AI Agent Can Access Your Encrypted Vault

Your Vault Just Learned to Talk to AI

Until now, interacting with your LegacyShield vault meant logging into the dashboard, uploading files, and managing everything manually. That works — but we live in an era where AI agents are becoming our digital co-pilots. Shouldn't they be able to work with your vault too?

Today, we're announcing that LegacyShield is now available as an MCP server. That means any AI agent that speaks the Model Context Protocol can connect directly to your encrypted vault.

What Is MCP?

The Model Context Protocol (MCP) is an open standard originally developed by Anthropic. It solves a simple but critical problem: how do you let AI agents interact with external tools and data sources in a safe, standardized way?

Before MCP, every integration was custom. Want Claude to check your calendar? Custom API. Want it to query a database? Another custom integration. Every tool, every agent, every connection — built from scratch.

MCP changes that. It defines a universal protocol that any AI client can use to discover and call tools on any MCP server. Think of it like USB-C for AI: one standard connector, infinite possibilities.

How It Works

┌─────────────┐     MCP Protocol     ┌──────────────────┐     HTTPS     ┌─────────────────┐
│  AI Client   │ ◄──────────────────► │  MCP Server       │ ◄───────────► │  LegacyShield   │
│  (Claude,    │    stdio / SSE       │  (legacy-shield)  │               │  API             │
│   Cursor)    │                      │                    │               │                  │
└─────────────┘                       └──────────────────┘               └─────────────────┘

1. Your AI client connects to the LegacyShield MCP server
2. The server exposes tools: list_vault_files and get_file_metadata
3. The AI agent can browse your vault, check file categories, and inspect metadata
4. All actual file contents stay encrypted — the server never decrypts anything

What Can an Agent Do With Your Vault?

With MCP access, your AI agent can:

• List all files in your vault, optionally filtered by category (IDENTITY, TAX, LEGAL, etc.)
• Inspect file metadata — see when a file was uploaded, its category, encryption headers, and status
• Help you organize — "Do I have my Dutch tax return from 2025 in the vault?"
• Audit your coverage — "What document categories am I missing?"
• Integrate into workflows — estate planning agents can verify that critical documents are actually stored

What it cannot do:

• Read your actual file contents (zero-knowledge encryption means only you hold the key)
• Upload, modify, or delete files (read-only access by design)
• Access your encryption key in any way

This is intentional. Your vault is a zero-knowledge system. MCP gives agents a window into what's there, not the keys to open it.

How to Set It Up

1. Get Your API Key

Log into your LegacyShield account and generate an agent API key. This key identifies your agent's requests to the vault.

2. Configure Your MCP Client

Add the LegacyShield server to your client's MCP configuration. Here's how for the most popular clients:

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "legacy-shield": {
      "command": "npx",
      "args": ["-y", "@legacy-shield/mcp-server"],
      "env": {
        "LEGACY_SHIELD_API_KEY": "your-api-key-here"
      }
    }
  }
}

Cursor (Settings → MCP → Add Server):

{
  "legacy-shield": {
    "command": "npx",
    "args": ["-y", "@legacy-shield/mcp-server"],
    "env": {
      "LEGACY_SHIELD_API_KEY": "your-api-key-here"
    }
  }
}

Any MCP-compatible client — the pattern is the same: point it at @legacy-shield/mcp-server via npx and pass your API key as an environment variable.

3. Start Talking to Your Vault

Once configured, your AI agent will automatically discover the LegacyShield tools. Try asking:

• "List all files in my LegacyShield vault"
• "Do I have any LEGAL documents stored?"
• "Show me the metadata for my most recent upload"

That's it. No complex setup, no API wrangling. Just connect and go.

Why This Matters

We believe the future of personal document management is agent-assisted. You shouldn't have to manually check whether your vault is complete, whether your will is up to date, or whether you've stored your partner's pension documents.

An AI agent with MCP access can do that for you — proactively, conversationally, and without ever compromising your encryption.

LegacyShield was built from day one with a zero-knowledge architecture. Adding MCP doesn't change that. It just makes your vault smarter about how it communicates what it knows — without ever revealing what it holds.

What's Next

This is version 1.0 of our MCP server. We're already working on:

• Upload support — let agents add files to your vault (with your explicit approval)
• Smart notifications — agents that remind you when documents are expiring
• Multi-vault queries — for estate planners managing multiple clients

The Model Context Protocol is still young, but it's growing fast. By making LegacyShield MCP-compatible today, we're ensuring your vault is ready for however you choose to interact with it tomorrow.

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Ready to connect your AI agent to your vault? Create your free LegacyShield account and generate an API key to get started.