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 LSTM-Kirigaya/openmcp-client --skill agent-ruler-openmcpgit clone --depth 1 https://github.com/LSTM-Kirigaya/openmcp-clientWrote 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/lstm-kirigaya/openmcp-client/agent-ruler-openmcp)<a href="https://agentmods.dev/skills/lstm-kirigaya/openmcp-client/agent-ruler-openmcp"><img src="https://agentmods.dev/badge/skills/lstm-kirigaya/openmcp-client/agent-ruler-openmcp/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/lstm-kirigaya/openmcp-client/agent-ruler-openmcp"><img src="https://agentmods.dev/badge/skills/lstm-kirigaya/openmcp-client/agent-ruler-openmcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 177 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 178 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00080 | $0.01208 |
| Opus 5 | $0.00040 | $0.00604 |
| Sonnet 5 | $0.00016 | $0.00242 |
| Haiku 4.5 | $0.00008 | $0.00121 |
Grade A, and why
agent-ruler-openmcp 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 12d 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 — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Ruler OpenMCP
Use this skill to help users install and operate the @agent-ruler/openmcp npm package. Prefer npm commands and the openmcp binary in all user-facing examples.
Package Facts
- npm package:
@agent-ruler/openmcp - CLI binary:
openmcp - Minimum Node.js:
>=18 - Default Gateway WebSocket:
ws://localhost:8282 - Default Gateway logs directory:
%USERPROFILE%\.openmcp\logs\gatewayon Windows,~/.openmcp/logs/gatewayon Unix-like systems
Install Or Upgrade
For normal users, recommend a global npm install:
npm install -g @agent-ruler/openmcp
openmcp --version
openmcp --help
To upgrade an existing global install:
npm install -g @agent-ruler/openmcp@latest
openmcp --version
If a specific release is needed:
npm install -g @agent-ruler/[email protected]
Avoid telling users to run yarn openmcp ...; global npm users should run openmcp ... directly.
First Run Workflow
Start Gateway before running commands that call service controllers:
openmcp gateway start
openmcp gateway status
If startup fails or status is not running, ask for these diagnostics:
openmcp gateway logs -n 200
openmcp gateway logs-dir
openmcp gateway run -p 8282
Use gateway run when the user needs foreground stderr/stdout. Use gateway logs for background failures; it should include both gateway.log and gateway-startup.log.
If the Gateway uses a non-default port, pass -g to commands that talk to it:
openmcp mcp server list -g ws://127.0.0.1:9000
Common Commands
Show help and versions:
openmcp --help
openmcp gateway --help
openmcp mcp --help
openmcp debug --help
Manage Gateway:
openmcp gateway start
openmcp gateway status
openmcp gateway logs -n 200
openmcp gateway stop
Add and connect an MCP server from a file:
openmcp mcp server add --file ./mcp-server.json
openmcp mcp server list
openmcp mcp session connect --id <serverId>
openmcp mcp session current
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.
- 12d ago First seen · 187 lines · 80 tokens per session scan A e23aefbce575
agent-ruler-openmcp is a skill published in the GitHub repository LSTM-Kirigaya/openmcp-client (752 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 80 tokens to every session and 1,208 once invoked, about $0.0004 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 2026-08-30.
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