NetsCLI

NetsCLI is a free, open-source toolkit for examining devices and services on a local network. It suits technical users who want interactive desktop checks alongside scriptable or AI-assisted workflows. Its broad set of access modes is useful, but it falls short of nmap for advanced detection and does not offer remote administration.

Overview

Built around one Rust core, NetsCLI brings LAN discovery, TCP and UDP port scanning, DNS queries, and host inspection to a desktop app, terminal UI, command-line interface, and MCP server. That range makes it practical for users who move between exploratory checks and repeatable diagnostics. It is a focused local-network tool, not a full network-management suite.

Key features

Desktop investigations and structured output

The desktop app supports multiple investigation tabs, sortable and filterable results, exports, and scan history. These features help keep checks organized and make it easier to revisit results. For automation, network operations can emit JSON or YAML; list commands also support CSV and Markdown. The available export formats make results more reusable, though they do not compensate for the missing advanced detection capabilities.

Discovery and AI-client integration

Host discovery can enrich results with reverse DNS, ARP cache data, MAC addresses, and device makers when the operating system has that information. The stdio MCP server exposes structured tools for discovery, port scans, ping, DNS, ARP, host inspection, network sweeps, interface listing, and mDNS discovery. Compatible clients include Claude Code and Cursor, giving AI agents a way to use local network tools. This is a useful distinction for agent-oriented workflows; users who do not need an MCP client can rely on the other interfaces.

Open source and verification

NetsCLI is MIT-licensed, and its library and MCP server are published on crates.io for Rust projects. The maker says each binary and installer is checksummed and signed with Sigstore cosign, with download verification instructions provided. Packet capture requires separate packet-capture downloads and libpcap on Linux or macOS, or Npcap on Windows, so it is not part of the standard setup.

Pricing

NetsCLI costs nothing. The MIT license permits personal, open-source, and commercial use, with no paid tier or trial needed to use the software. That makes it a straightforward option for individuals and teams able to run a command-line tool or desktop app; there are no plan seat or quota terms to weigh.

Platforms

NetsCLI supports Linux, macOS, and Windows. Packet capture has an additional platform-specific dependency: libpcap on Linux or macOS, and Npcap on Windows. The packet-capture downloads are separate from the regular downloads.

Who it's for

NetsCLI is best for technical users who need local discovery, port checks, DNS queries, and host inspection across interactive and automated workflows. Its CLI suits repeatable diagnostics and automation; the desktop app is more appropriate for tabbed investigations and reviewing scan history. The MCP server is aimed at compatible AI clients that need structured access to local network tools. Choose another tool if remote administration, OS fingerprinting, NSE scripts, or more advanced service detection is central to the job.

Pros and cons

Pros

• Four interfaces share one core: users can choose desktop, terminal, CLI, or MCP access without changing the underlying toolkit.
• Useful structured output: JSON and YAML for network operations, plus CSV and Markdown for lists, support automation and sharing.
• Permissive, free license: MIT licensing allows personal, open-source, and commercial use.
• Download checks: Sigstore cosign signatures and checksums give users a way to verify binaries and installers.

Cons

• Not a remote administration tool: its scope is local network investigation, not remote management.
• Less advanced than nmap in key areas: it lacks advanced service detection, NSE scripts, and OS fingerprinting.
• Packet capture takes extra setup: it requires a separate download and an OS-specific packet-capture dependency.

Alternatives

Port Scanner Software is a broader category comparison if you want to weigh more tools before choosing.

• Naabu is another free, MIT-licensed option if you want a port-scanning tool across Linux, macOS, Windows, API, or self-hosted environments.
• Nmap is the better fit when advanced service detection, NSE scripts, or OS fingerprinting matter more than NetsCLI's multiple interfaces. Its free end-user license does not allow redistribution within commercial software or hardware products.
• RustScan is a free open-source port scanner if Android support or a self-hosted deployment is important.
• ScanSearch is worth considering for internet scanning through an API or web interface; its paid Internet Scanner plan starts at $0.30 a month, billed per kpps/month, with 100–10,000 kpps, unlimited results per scan, full CSV/JSON export, and a queue of up to 10 scans.
• Masscan is a free alternative under the GNU Affero General Public License v3 if that licensing model and its supported platforms suit your use.
• Unicornscan is another free option, distributed as GPL software with downloadable packages and source.
• Angry IP Scanner is a free, GPLv2 alternative for Linux, macOS, and Windows.
• Pentest-Tools Port Scanner offers a web and API option, with a free tier and a NetSec plan priced at $95 a month.

Verdict

Choose NetsCLI if you want a free, MIT-licensed local network toolkit that can move between desktop investigation, CLI automation, and compatible AI clients. Its strongest case is that breadth of access paired with practical structured output. Look elsewhere if your work depends on remote administration or the advanced service and OS detection features NetsCLI lacks.