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Aegis MCP server

by undercurrentholdings.com·com.undercurrentholdings/aegis·v1.4.2
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Local stdio MCP server for the AEGIS governance client. The hosted evaluation service is offline.

B83/100grade B
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Safety scan
B83/100

full report

Adoption
Growing

0 stars59 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Aegis tools (6)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • aegis_evaluate_proposal

    Evaluate an engineering proposal through the AEGIS gate checks.

  • aegis_get_decision

    Fetch a specific governance decision by ID, with full gate detail.

  • aegis_get_usage

    Get the authenticated customer's evaluation usage report.

  • aegis_health

    Check AEGIS API health (service status, version, components).

  • aegis_list_decisions

    List recent governance decisions for the authenticated customer.

  • aegis_quick_risk_check

    Quick risk threshold check without a full Bayesian evaluation.

Public scan report

scanner v0.1.10 · 2026-10-02 · same rubric, same numbers if you re-run it

no findings
  • Code scan13 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 14 days ago15/15
  • Maintainer identitynamespace and repository owner differ; GitHub account older than a year; website matches verified namespace8/10
Overall 83/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Aegis compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
83/100
higher than 65% of 48,255 servers
Tools
6
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
59
more than 48% of 12,191 servers with a package

What its tools let an agent do: 6 read

Release history: 2 versions in the registry since 2026-06-10, latest 2026-09-18, typically one every 100 days.

Install Aegis in Claude Code, Cursor or VS Code

claude mcp add aegis -- uvx aegis-governance
Add to Cursor

What the publisher says

From the Aegis repository's README, as published. We do not edit it. Read it on GitHub

AEGIS Governance — MCP Server

Status: the hosted AEGIS service is offline (since September 2026).

The hosted API and the hosted MCP endpoint (mcp.aegis.undercurrentholdings.com) are offline.

The local server does not evaluate proposals itself, so no tool returns an evaluation at this time.

Current status:

What the package is

aegis-governance on PyPI is a Python client for the AEGIS API. It also contains a local MCP server. The package installs one console script, aegis-mcp-server. This script starts a local MCP server that uses the stdio transport. The package has no other command-line tool.

The local server has no evaluation engine. By default, the client sends all requests to the hosted AEGIS API. Sandbox mode (the mode without an API key) also uses the hosted API. While the hosted service is offline, tool calls do not return evaluations.

Install

pip install "aegis-governance[mcp]"

The [mcp] extra is necessary for aegis-mcp-server. On Python < 3.10, the extra installs nothing, and aegis-mcp-server exits with an install hint.

Local stdio MCP configuration

Claude Code

claude mcp add aegis -- aegis-mcp-server

Cursor (.cursor/mcp.json) / Windsurf / any stdio MCP client:

{
  "mcpServers": {
    "aegis": { "command": "aegis-mcp-server" }
  }
}

VS Code (.vscode/mcp.json):

{
  "servers": {
    "aegis": { "type": "stdio", "command": "aegis-mcp-server" }
  }
}

Tools

tools/list from aegis-mcp-server in aegis-governance 1.4.2 returns these six tools. Without AEGISAPIKEY, aegisevaluateproposal and aegishealth call the hosted API, and the other four tools return an AuthenticationError JSON result without an API call. With AEGISAPI_KEY set, all six tools call the hosted API.

The descriptions below are quoted from the server. They do not describe a service that is available now.

Reading the source

The aegis-governance source repository is private. To read the published source, download the source distribution (sdist) from PyPI:

pip download --no-binary :all: --no-deps "aegis-governance==1.4.2"

Or get the .tar.gz file from the PyPI release files.

Nothing above is checked by us. What we check is on the safety report.

Aegis: common questions

Is Aegis MCP server safe?
Mostly: it is graded B (83/100). Read the Aegis safety report
How do I install Aegis?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Aegis need an API key?
Yes. The registry entry asks for AEGIS_API_KEY.
Is Aegis maintained?
The last commit was 47 days ago (2026-09-18). The latest release is v1.4.2.
How does Aegis compare with other MCP servers?
safety score 83/100 (higher than 65% of 48,255 servers); tools 6 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.