agentaegis-security

agentaegis-security is a skill for Claude Code from astafford8488/agentaegis-mcp. It costs 108 tokens per session (1,521 once invoked), scanned A, original, MIT.

A security-scanning skill that uses the AgentAegis service to check endpoints, code, repositories, domains, and related security signals.

In plain words
What is it for?
It helps scan for vulnerabilities, exposed secrets, unsafe dependencies, known CVEs, suspicious IPs or domains, DNS/TLS/email problems, and compliance readiness.
Why use it?
Security checks can require several different scanners and threat-information sources. This gathers those checks through one service, with paid calls costing $1 to $5 each.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: positional $N argument.

Good fit It helps scan for vulnerabilities, exposed secrets, unsafe dependencies, known CVEs, suspicious IPs or domains, DNS/TLS/email problems, and compliance readiness.

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Install with agentmods
npx agentmods add skills/astafford8488/agentaegis-mcp/agentaegis-security
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add astafford8488/agentaegis-mcp --skill agentaegis-security
Clone the repo
git clone --depth 1 https://github.com/astafford8488/agentaegis-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for agentaegis-security

README.md
[![agentmods](https://agentmods.dev/badge/skills/astafford8488/agentaegis-mcp/agentaegis-security/github.svg)](https://agentmods.dev/skills/astafford8488/agentaegis-mcp/agentaegis-security)
Your own site
<a href="https://agentmods.dev/skills/astafford8488/agentaegis-mcp/agentaegis-security"><img src="https://agentmods.dev/badge/skills/astafford8488/agentaegis-mcp/agentaegis-security/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agentaegis-security

Your own site · 80×15
<a href="https://agentmods.dev/skills/astafford8488/agentaegis-mcp/agentaegis-security"><img src="https://agentmods.dev/badge/skills/astafford8488/agentaegis-mcp/agentaegis-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,521 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00108 $0.01521
Opus 5 $0.00054 $0.00760
Sonnet 5 $0.00022 $0.00304
Haiku 4.5 $0.00011 $0.00152

Measured 11d ago against content hash c31888a9d9ed, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

agentaegis-security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/agentaegis-security/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AgentAegis security scans

AgentAegis is a hosted MCP server that runs real security scanners (nmap, Nuclei, sslyze, Semgrep, trufflehog, trivy) and queries real threat-intel feeds (NVD, AbuseIPDB, AlienVault OTX, abuse.ch, HIBP). Findings describe real infrastructure.

Setup

Add the server to your MCP client:

{
  "mcpServers": {
    "agentaegis": {
      "url": "https://agentaegis-mcp-production.up.railway.app/mcp",
      "headers": { "Authorization": "Bearer aegis_YOUR_API_KEY_HERE" }
    }
  }
}

Get a key at https://agentaegis.org/pay. Alternatively, omit the header and pay per call in USDC on Base via x402 — no signup, the server answers with an HTTP 402 challenge your x402-capable client settles automatically.

If the tools are not available, the server is not connected. Say so rather than guessing at answers this skill is meant to measure.

Cost — this skill spends real money

Tools cost $1 to $5 per call, charged when the call is made. A scan that returns nothing useful still costs.

  • Before the first paid call in a conversation, tell the user which tool you plan to call and what it costs, and wait for their agreement.
  • Never run a scan the user did not ask for. Never call paid tools to explore the catalog.
  • Never retry a paid tool in a loop. On error, report it and stop.

Free, always: help, account_balance, agent_whoami, agent_history, agent_scan_get.

Call help for exact current pricing rather than quoting numbers from memory.

Always check for a prior result first

Every paid scan is stored. agent_history lists your prior scans and agent_scan_get returns any one of them in full, both free. When the user asks about a target you have looked at before, retrieve it instead of re-paying. Only re-scan when they want fresh data or the earlier scan is stale.

Choosing a tool

The user is asking Use
Is this endpoint/domain safe to call, trust or pay? vet_endpoint
Should I install this MCP server or plugin? scan_mcp_plugin
Should I trust this agent skill? scan_skill
What is CVE-YYYY-NNNNN? cve_lookup
Is this IP or domain malicious? threat_intel_lookup
Can our email be spoofed? email_security_audit, or dns_security_check for records only
Is our TLS configured correctly? ssl_tls_audit
Are there vulnerabilities in this code? sast_scan
Are there hardcoded secrets? secret_scan
Are our dependencies vulnerable? dependency_audit
What ports are exposed? vuln_scan_network
Is this web app vulnerable? vuln_scan_web_app
Are we SOC 2 / ISO 27001 / HIPAA / PCI-DSS / NIST CSF ready? compliance_framework_check
We have an incident incident_triage

Read the full file on GitHub · 93 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 93 lines · 108 tokens per session scan A c31888a9d9ed

Subscribe to this mod's changes

agentaegis-security is a skill published in the GitHub repository astafford8488/agentaegis-mcp (1 stars, last pushed 1mo ago), licensed MIT. It adds 108 tokens to every session and 1,521 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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