What is jgs-sysmlv2-api-mcp?

A connector for the SysML v2 REST API, a web service used to read and edit SysML v2 engineering models. It lets Gemini CLI navigate, version, and author models, with confirmation before changes are committed.

Use it to inspect model contents, review versions, and create or update SysML v2 model data from Gemini CLI.

It provides a conversational way to work with a reachable SysML v2 service while keeping model changes explicitly confirmed.

jgs-sysmlv2-api-mcp — Plugin for Gemini CLI by jgsystemsconsulting

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.

Clone the repo

git clone --depth 1 https://github.com/jgsystemsconsulting/jgs-sysmlv2-api-mcp

Made for: Gemini CLI.

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension/github.svg)](https://agentmods.dev/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension)

Your own site

<a href="https://agentmods.dev/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension/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.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/jgsystemsconsulting/jgs-sysmlv2-api-mcp/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown No closer match found in the catalogue.

Security

Grade A, and why

jgs-sysmlv2-api-mcp 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 23d 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.

gemini-extension.json · 11 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

1 file beside gemini-extension.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

examples/.mcp.json.example 296 B

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.

23d ago First seen · 11 lines scan A 86c5a0a75f7a

Subscribe to this mod's changes

jgs-sysmlv2-api-mcp is a plugin published in the GitHub repository jgsystemsconsulting/jgs-sysmlv2-api-mcp (2 stars, last pushed 19d ago), with no licence file. 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 2026-09-23.

ai-agents mbse mcp model-based-systems-engineering sysml sysml-v2

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jgs-sysmlv2-api-mcp