nmap-service-detection

nmap-service-detection is a skill for Claude Code from automateyournetwork/netclaw. It costs 55 tokens per session (1,497 once invoked), scanned A, original, Apache-2.0.

A network reconnaissance tool uses nmap to identify software and versions on open ports, fingerprint operating systems, run targeted checks, and scan for known vulnerabilities. NSE scripts are nmap add-ons for protocol and security tests.

In plain words
What is it for?
Use it for service and version identification, operating-system detection, SSL or SMB checks, vulnerability scans, and fuller reconnaissance of a host or small range.
Why use it?
It turns open-port results into more useful information about what a host is running and where it may be misconfigured or vulnerable. This helps focus follow-up investigation on specific services.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: built for openclaw.

Good fit Use it for service and version identification, operating-system detection, SSL or SMB checks, vulnerability scans, and fuller reconnaissance of a host or small range.

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Install with agentmods
npx agentmods add skills/automateyournetwork/netclaw/nmap-service-detection
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 automateyournetwork/netclaw --skill nmap-service-detection
Clone the repo
git clone --depth 1 https://github.com/automateyournetwork/netclaw

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 nmap-service-detection

README.md
[![agentmods](https://agentmods.dev/badge/skills/automateyournetwork/netclaw/nmap-service-detection/github.svg)](https://agentmods.dev/skills/automateyournetwork/netclaw/nmap-service-detection)
Your own site
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/nmap-service-detection"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/nmap-service-detection/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 nmap-service-detection

Your own site · 80×15
<a href="https://agentmods.dev/skills/automateyournetwork/netclaw/nmap-service-detection"><img src="https://agentmods.dev/badge/skills/automateyournetwork/netclaw/nmap-service-detection.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,497 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00055 $0.01497
Opus 5 $0.00028 $0.00749
Sonnet 5 $0.00011 $0.00299
Haiku 4.5 $0.00006 $0.00150

Measured 9d ago against content hash 5609301cdd22, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nmap-service-detection 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 9d 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.

workspace/skills/nmap-service-detection/SKILL.md · 152 lines

How it starts

The opening of the file, as written. The whole thing — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Service Detection & Vulnerability Scanning with nmap

How to Call the nmap MCP Tools

python3 $MCP_CALL "python3 -u $NMAP_MCP_SCRIPT" TOOL_NAME '{"param":"value"}'

When to Use

  • Identify what software/version is running on an open port
  • Fingerprint the OS of a network device or server
  • Run targeted NSE scripts (SSL cert check, banner grab, protocol probe)
  • Scan for known CVEs and common misconfigurations
  • Full reconnaissance sweep of a single host or small range

Available Tools

Tool Purpose Privileges
nmap_service_detection Service name + version on open ports (-sV) none
nmap_os_detection OS fingerprinting (-O) cap_net_raw
nmap_script_scan Run specific NSE scripts none
nmap_vuln_scan Run the "vuln" NSE script category none
nmap_full_recon SYN + service + OS + default scripts all-in-one cap_net_raw

Workflow: Service Identification

When asked "what's running on this host?" or "identify the services":

Step 1: Service Version Detection

python3 $MCP_CALL "python3 -u $NMAP_MCP_SCRIPT" nmap_service_detection '{"target":"192.168.1.1","ports":"common","intensity":7}'

Returns per-port: service name, product, version, CPE identifier.

Step 2: OS Fingerprinting

python3 $MCP_CALL "python3 -u $NMAP_MCP_SCRIPT" nmap_os_detection '{"target":"192.168.1.1"}'

Works best when the target has at least one open and one closed port.

Workflow: Security Assessment

When asked "check this host for vulnerabilities" or "security scan":

Step 1: Full Recon

Run the all-in-one audit sweep:

python3 $MCP_CALL "python3 -u $NMAP_MCP_SCRIPT" nmap_full_recon '{"target":"192.168.1.1","ports":"common"}'

This combines SYN scan + service detection + OS fingerprinting + default NSE scripts.

Step 2: Vulnerability Scan

Run the vuln NSE category for known CVEs:

python3 $MCP_CALL "python3 -u $NMAP_MCP_SCRIPT" nmap_vuln_scan '{"target":"192.168.1.1","ports":"common"}'

Read the full file on GitHub · 152 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. 9d ago First seen · 152 lines · 55 tokens per session scan A 5609301cdd22

Subscribe to this mod's changes

nmap-service-detection is a skill published in the GitHub repository automateyournetwork/netclaw (657 stars, last pushed 6d ago), licensed Apache-2.0. It adds 55 tokens to every session and 1,497 once invoked, about $0.0003 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 2026-09-03.

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