Legacy Shield runs on your own machine — the client starts it, so there is no endpoint to ping. 39 installs a week from npm. Last commit 22 Oct 2026.
Zero-knowledge encrypted vault for AI agents. EU-hosted persistent storage.
Nothing serious here today
Today is the operative word: we check Legacy Shield every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add legacy-shield -e 'LEGACY_SHIELD_API_KEY=<LEGACY_SHIELD_API_KEY>' -- npx -y @legacy-shield/mcp-server{
"mcpServers": {
"legacy-shield": {
"command": "npx",
"args": [
"-y",
"@legacy-shield/mcp-server"
],
"env": {
"LEGACY_SHIELD_API_KEY": "<LEGACY_SHIELD_API_KEY>"
}
}
}
}[mcp_servers.legacy-shield]
command = "npx"
args = ["-y", "@legacy-shield/mcp-server"]
env = { LEGACY_SHIELD_API_KEY = "<LEGACY_SHIELD_API_KEY>" }{
"mcpServers": {
"legacy-shield": {
"command": "npx",
"args": [
"-y",
"@legacy-shield/mcp-server"
],
"env": {
"LEGACY_SHIELD_API_KEY": "<LEGACY_SHIELD_API_KEY>"
}
}
}
}{
"servers": {
"legacy-shield": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@legacy-shield/mcp-server"
],
"env": {
"LEGACY_SHIELD_API_KEY": "<LEGACY_SHIELD_API_KEY>"
}
}
}
}Put your own value in place of
<LEGACY_SHIELD_API_KEY> (Your LegacyShield API key (starts with ls_). Get one at POST https://api.legacyshield.eu/api/v1/auth/agent-register).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
LEGACY_SHIELD_API_URL (LegacyShield API base URL).
Alternatives to Legacy Shield
same job, measured the same wayZero-knowledge encrypted storage for humans and AI agents. Client-side AES-256-GCM, EU-hosted.
Encrypted, pay-per-use persistent memory storage for AI agents, gated by x402 payments on Base.
Local persistent memory for AI agents with recall, search, forgetting, and encrypted storage.
Local persistent memory for AI agents with recall, search, forgetting, and encrypted storage.
Sovereign E2E cloud storage for AI agents. Zero-knowledge, RGPD-compliant.
Private, permanent encrypted storage for AI agents. Paid per call in USDC via x402.
Credential vault for AI agents — encrypted storage, lease-based access, CRP support.
S3-compatible European object storage for AI agents. GDPR-compliant, EU-hosted, crypto payments.
Legacy Shield — questions
Answers built from our own checks of this server.