Aegis - AI Agent Governance MCP Server

The governance layer for AI agents. One API, 12 frameworks, every governance primitive. It runs locally over stdio via the published package.

People who work with ai governance, langchain and policy engine and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-29 · ★ 15 · #39 OF 106 MAINTAINED AI & ML · VERIFIED 2026-09-18

MIT · Python servers · how we verify → /methodology

01 · Install Aegis - AI Agent Governance

Claude Code

claude mcp add acacian-aegis -- uvx agent-aegis

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "acacian-aegis": {
      "command": "uvx",
      "args": [
        "agent-aegis"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package agent-aegis - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.Acacian is GitHub-verified and matches the repo owner

03 · What Aegis - AI Agent Governance can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.0.0 · 2026-08-08

First stable release. · 1.0.0 adds no features. It states what the existing surface guarantees - and it ships only because that surface was verified to still work. · The API is now stable · API Stability is the binding…

v0.9.5 · 2026-04-27

What's New · MCP STDIO Injection Protection (NEW) · Full defense against the OX Security MCP STDIO vulnerability (2026-04-15) · 3-layer protection: content scanning, frame validation, unified guard · Detects JSON-RPC…

v0.9.4 · 2026-04-11

What's New · \aegis check drift\ CLI · Offline entropy-based drift detector for saved agent traces. Same signal that \auto_instrument()\ exposes at runtime, now runnable on any JSONL trace from LangSmith, OTel, or…

04 · Who maintains Aegis - AI Agent Governance

Aegis - AI Agent Governance is maintained by acacian. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/acacian/aegis
category: AI & ML - ranked #39 of 106 actively-maintained AI & ML servers as of 2026-09-18.
release cadence: 1 release in the last 90 days (latest 2026-08-08)
registry: io.github.Acacian/aegis (active, first published 2026-03-22 · 2 versions)
packages: pypi:agent-aegis

06 · Aegis - AI Agent Governance FAQ

What is Aegis - AI Agent Governance?

The governance layer for AI agents. One API, 12 frameworks, every governance primitive. It runs locally over stdio via the published package.

Is Aegis - AI Agent Governance still maintained?

Yes - as of 2026-09-18, its last commit was 2026-08-29 and it shipped 1 release in the last 90 days. We re-verify nightly.

How do I install Aegis - AI Agent Governance?

Run `uvx agent-aegis`. You can also paste the ready-made client config above.

Does Aegis - AI Agent Governance run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Aegis - AI Agent Governance

Alternatives to Aegis - AI Agent Governance

Maintained AI & ML servers if Aegis - AI Agent Governance isn't the fit.

Pairs well with

Servers that cover what Aegis - AI Agent Governance doesn't - only shown when the pairing reason fits the companion.

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