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Encrypted secrets and credential management for agents
About
Encrypted secrets and credential management for agents
Security Report
secure-vault-mcp is a well-intentioned secrets management server with a sound encryption model (AES-256-GCM) and token-based access control. However, the security implementation has significant gaps: the server lacks any authentication/authorization mechanism to control who can store, retrieve, or rotate secrets; no input validation is evident from the documentation; and critical security operations (like token issuance and secret injection) are exposed without access controls. The in-memory-only storage means secrets are lost on restart, and the inability to verify implementation details from the provided files leaves core security claims unvalidated. Users should be aware these architectural weaknesses undermine the threat model despite good cryptographic intentions. Supply chain analysis found 4 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.
4 files analyzed · 16 issues found
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Unverified package source
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How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-mdfifty50-boop-secure-vault": {
"args": [
"-y",
"secure-vault-mcp"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
secure-vault-mcp
MCP server for agent-native secrets management. 24,008 secrets have been found in MCP config files on public GitHub. This server solves that.
Agents need secrets to call APIs, but they shouldn't see raw values. secure-vault-mcp stores secrets encrypted with AES-256-GCM, issues short-lived scoped tokens, and injects secrets into requests server-side so the agent never handles plaintext credentials.
Install
npx secure-vault-mcp
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"secure-vault": {
"command": "npx",
"args": ["secure-vault-mcp"]
}
}
}
From source
git clone https://github.com/mdfifty50-boop/secure-vault-mcp.git
cd secure-vault-mcp
npm install
node src/index.js
Tools
store_secret
Store an encrypted secret with optional rotation policy.
| Param | Type | Default | Description |
|---|---|---|---|
name | string | required | Secret name (e.g. "openai_api_key") |
value | string | required | Secret value — encrypted immediately |
service | string | "default" | Service this secret belongs to |
rotation_policy | string | "none" | "none", "daily", "weekly", "monthly" |
get_agent_token
Issue a short-lived, scoped token. The agent receives an opaque token ID, never the raw secret.
| Param | Type | Default | Description |
|---|---|---|---|
agent_id | string | required | Requesting agent identifier |
service | string | required | Service to get a token for |
scope | string | "read" | "read", "write", "admin" |
ttl_seconds | number | 300 | Token TTL (10s to 86400s) |
rotate_secrets
Rotate all secrets for a service. Old tokens are invalidated.
| Param | Type | Description |
|---|---|---|
service | string | Service whose secrets to rotate |
new_value | string | New secret value |
audit_secret_access
View who accessed what secrets over a time range.
| Param | Type | Default | Description |
|---|---|---|---|
time_range | string | "24h" | "1h", "6h", "24h", "7d", "all" |
agent_id | string | optional | Filter by agent |
secret_name | string | optional | Filter by secret |
scan_config_for_leaks
Scan config text for exposed secrets. Detects AWS keys, GitHub tokens, OpenAI/Anthropic keys, Slack tokens, Stripe keys, private key blocks, bearer tokens, and generic credentials using 12 regex patterns.
| Param | Type | Default | Description |
|---|---|---|---|
config_text | string | required | Config content to scan |
source_label | string | "unknown" | Label for audit trail |
inject_secret_to_request
Return a request with the secret injected server-side. The agent provides a template with {{SECRET}} placeholder and a valid token ID.
| Param | Type | Description |
|---|---|---|
token_id | string | Token from get_agent_token |
request_template | string | Template with {{SECRET}} placeholder |
Resources
| URI | Description |
|---|---|
secure-vault://secrets | All stored secret names with metadata (no raw values) |
Usage Pattern
1. store_secret — store credentials at setup time
2. get_agent_token — agent requests a scoped, time-limited token
3. inject_secret_to_request — inject secret into API call template
4. rotate_secrets — rotate when needed, old tokens auto-invalidate
5. scan_config_for_leaks — check config files before committing
6. audit_secret_access — review access trail
Security Model
- Secrets encrypted at rest with AES-256-GCM using a server-generated key
- Agents receive opaque token IDs, never raw secret values
- Tokens are scoped (read/write/admin) and time-limited (default 5 minutes)
- Token rotation invalidates all outstanding tokens for the rotated secret
- Full audit trail of every store, token issuance, and injection
- In-memory storage — secrets exist only for the server session lifetime
Tests
npm test
License
MIT
Reviews
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