What is aegis?
aegis is a MCP server by Acacian that policy-based governance for agent tool calls across LangChain, OpenAI, Anthropic and MCP: YAML policies, approval gates, risk assessment and audit logging. It is listed under Security and has 18 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | Acacian |
| Repository | Acacian/aegis |
| Popularity | 18 GitHub stars |
| Category | Security |
| Security | Low risk (96/100) |
| Rank | #1,380 of 4,418 MCP servers; #63 in Security |
| License | MIT |
| Last commit | 2026-10-16 |
| Runs | Locally |
| Language | Python |
| Platforms | macOS, Windows, Linux |
Is aegis safe to install?
aegis scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 5 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install aegis?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/Acacian/aegis
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add aegis -- <command from README> claude mcp add --transport http aegis <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs aegis for you:
Add the "aegis" MCP server from https://github.com/Acacian/aegis to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.