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.
npx skills add 123pc/Geogebra_mcp --skill geogebra-mastergit clone --depth 1 https://github.com/123pc/Geogebra_mcpWrote 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.
[](https://agentmods.dev/skills/123pc/geogebra_mcp/geogebra-master)<a href="https://agentmods.dev/skills/123pc/geogebra_mcp/geogebra-master"><img src="https://agentmods.dev/badge/skills/123pc/geogebra_mcp/geogebra-master/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.
<a href="https://agentmods.dev/skills/123pc/geogebra_mcp/geogebra-master"><img src="https://agentmods.dev/badge/skills/123pc/geogebra_mcp/geogebra-master.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00123 | $0.03205 |
| Opus 5 | $0.00062 | $0.01603 |
| Sonnet 5 | $0.00025 | $0.00641 |
| Haiku 4.5 | $0.00012 | $0.00320 |
Grade A, and why
geogebra-master 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.
How it starts
The opening of the file, as written. The whole thing — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GeoGebra Master
Act as a precise GeoGebra operator through the geogebra MCP server. The goal is not just to send commands, but to design a robust construction that is ordered, inspectable, animated when useful, and saved/exported when requested.
This skill follows the official GeoGebra tutorial structure: Graphing, Geometry, 3D Graphics, CAS, Spreadsheet, Probability, and Advanced workflows. Choose the matching mode before issuing commands.
First Contact
- Ask the user where to save output files before starting. If the user hasn't specified an output directory or
.ggbfile path, ask: "Where should I save the .ggb file?" Do NOT proceed with construction until this is confirmed. - Ask the user whether to use online (CDN) or local (offline bundle) GeoGebra. Present the options in natural language:
- Online mode: loads GeoGebra from the CDN (requires internet, always up-to-date)
- Local mode: uses a cached offline bundle (works without internet, needs prior download)
If the user chooses local mode, set
GEOGEBRA_WEB_BUNDLE=localbefore proceeding. If online, use the default CDN mode.
- Call
geogebra_statusfirst for any real drawing task. - For desktop backend only (
GEOGEBRA_BACKEND=desktop): GeoGebra must already be running with--remote-debugging-port=9222. If status showsconnected: false, tell the user: "Please start GeoGebra Classic 6 with remote debugging enabled: double-clickstart_geogebra.bator runGeoGebra.exe --remote-debugging-port=9222. Then I'll continue." For Web Runtime (default), this step does not apply — the daemon launches Chromium automatically. - If status still reports disconnected, suggest
geogebra-mcp-doctor. - Call
geogebra_helpwhen uncertain about mechanism, animation, or command syntax. - Prefer structured tools:
- Use
geogebra_create_constructionfor complete named constructions. - Use
geogebra_run_commandsfor ordered command batches. - Use
geogebra_execonly for one-off commands or quick repair.
- Use
- After all commands, call
geogebra_get_objectsto verify the construction is not empty. - If verification passes, save with
geogebra_saveand optionallygeogebra_export_png.
What ships with it
1 file beside SKILL.md 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.
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.
- 9d ago First seen · 292 lines · 123 tokens per session scan A c1b6a444b004
geogebra-master is a skill published in the GitHub repository 123pc/Geogebra_mcp (4 stars, last pushed 3mo ago), licensed MIT. It adds 123 tokens to every session and 3,205 once invoked, about $0.0006 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 2026-08-31.
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