A plugin for controlling GNS3, a network-emulation tool used to build virtual networking labs. It connects an agent to network topologies, devices, templates, and consoles.

Use it to build topologies, manage device lifecycles, take snapshots, capture packets, manage templates and permissions, and automate device command-line consoles.

It lets network work be performed and tested in an emulated lab environment instead of only on physical equipment.

gns3 — Plugin by Olaw2jr

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.

Claude Code

/plugin marketplace add Olaw2jr/gns3-mcp

agentmods

npx agentmods add plugins/olaw2jr/gns3-mcp/plugin

Clone the repo

git clone --depth 1 https://github.com/Olaw2jr/gns3-mcp

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

gns3 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 today.

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.

plugin/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "gns3",
  "version": "0.1.0",
  "description": "Drive a GNS3 v3 network-emulation controller from Claude: build topologies, manage device lifecycle, snapshot, capture packets, manage templates/computes/RBAC, and automate device CLIs over node consoles.",
  "author": { "name": "Oscar" },
  "keywords": ["gns3", "networking", "mcp", "automation", "labs"],
  "mcpServers": "./.mcp.json",
  "commands": "./commands"
}

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.

today First seen · 10 lines scan A c2f1d36218f2

Subscribe to this mod's changes

gns3 is a plugin published in the GitHub repository Olaw2jr/gns3-mcp (0 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.

Data and AI Languages Productivity claude fastmcp gns3 mcp model-context-protocol network-automation

gns3

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other plugins, from other repositories

marketplace

archhub-mcp

swag-mcp

slack-mcp

slack-mcp

investor-relations-mcp