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Encrypted credential vault for AI agents — auto OAuth refresh, rate limiting, audit logging.
About
Encrypted credential vault for AI agents — auto OAuth refresh, rate limiting, audit logging.
Security Report
The Clavis MCP server is well-designed with strong security practices. It implements proper authentication via JWT, avoids storing secrets in logs or context when possible (via server-side credential injection), and includes comprehensive testing. The code is clean with appropriate error handling and input validation. Minor concerns around broad exception handling and the legacy get_credentials tool (which is appropriately flagged as unsafe) do not significantly impact the overall security posture. Supply chain analysis found 2 known vulnerabilities in dependencies (0 critical, 2 high severity). Package verification found 1 issue.
4 files analyzed · 7 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-kn0wbot-clavis": {
"args": [
"-y",
"@clavisagent/mcp-server"
],
"command": "npx"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Clavis MCP Server
Secure credential management for Claude Desktop and MCP servers.
Features
- 🔐 Encrypted credential storage (AES-128-CBC + HMAC-SHA256, via Fernet)
- 🛡️ Server-side credential injection — the raw key never enters the conversation
- 🔄 Automatic OAuth token refresh
- 📡 Thin forwarding layer — rate limiting, audit logging, and usage tracking are all handled by the Clavis server
Installation
npx @clavisagent/mcp-server
Or install globally:
npm install -g @clavisagent/mcp-server
Usage with Claude Desktop
Add the following to your Claude Desktop configuration file (claude_desktop_config.json):
{
"mcpServers": {
"clavis": {
"command": "npx",
"args": ["-y", "@clavisagent/mcp-server"],
"env": {
"CLAVIS_API_KEY": "eyJ..."
}
}
}
}
Usage with Claude Code
claude mcp add clavis -- npx -y @clavisagent/mcp-server
Configuration
| Variable | Required | Default | Description |
|---|---|---|---|
CLAVIS_API_KEY | yes | — | Your Clavis JWT, from POST /v1/auth/login. Not the cla_… key shown at sign-up. |
CLAVIS_API_URL | no | https://clavisagent.com | Base URL of your Clavis instance. Set this for self-hosted deployments. |
Available Tools
| Tool | Description |
|---|---|
call_service | Recommended. Make an API call with server-side credential injection — the credential is injected into the upstream request server-side, so the raw key never enters the conversation. |
get_credentials | Legacy. Returns the raw access token or API key for a named service. Prefer call_service. |
list_services | List all services with stored credentials |
check_credential_status | Check the status and expiry of credentials for a service |
Security note
Prefer call_service over get_credentials. call_service keeps the secret
server-side, so a prompt injection has no credential in context to exfiltrate.
get_credentials places the raw key in the conversation and exists only for
callers that must hold the token themselves.
License
MIT
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