mqtt-operator

mqtt-operator is a skill for Claude Code, Codex from clawdotnet/openclaw.net. It costs 20 tokens per session (157 once invoked), scanned A, original, MIT.

A safety-focused operator for MQTT, a messaging system commonly used by connected devices to exchange small messages through named topics.

In plain words
What is it for?
Use it to sample messages, inspect recent events, and publish small structured JSON messages when the topic is allowed.
Why use it?
It reduces the risk of publishing to the wrong topic or sending an unsafe payload by checking topic meaning, message shape, and access rules first.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/clawdotnet/openclaw.net/mqtt-operator
Any agent
npx skills add clawdotnet/openclaw.net --skill mqtt-operator
Clone the repo
git clone --depth 1 https://github.com/clawdotnet/openclaw.net

Made for: Claude Code, Codex.

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.

agentmods badge for mqtt-operator

README.md
[![agentmods](https://agentmods.dev/badge/skills/clawdotnet/openclaw.net/mqtt-operator.svg)](https://agentmods.dev/skills/clawdotnet/openclaw.net/mqtt-operator)
Your own site
<a href="https://agentmods.dev/skills/clawdotnet/openclaw.net/mqtt-operator"><img src="https://agentmods.dev/badge/skills/clawdotnet/openclaw.net/mqtt-operator.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 157 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00020 $0.00157
Opus 5 $0.00010 $0.00078
Sonnet 5 $0.00004 $0.00031
Haiku 4.5 $0.00002 $0.00016

Measured 5d ago against content hash ca18d9da8f7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mqtt-operator 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 5d 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.

src/OpenClaw.Gateway/skills/mqtt-operator/SKILL.md · 19 lines

What it actually says

When interacting with MQTT:

  1. Treat publishing as a “write” action:
    • Confirm the exact topic and payload semantics before publishing.
  2. For reads:
    • Use mqtt.subscribe_once to sample a topic and confirm payload shape.
    • Use mqtt.get_last when the MQTT event bridge is enabled.
  3. Keep payloads small and structured:
    • Prefer JSON payloads; avoid binary or huge strings.
  4. Respect topic policies:
    • If a topic is denied by allow/deny globs, explain what’s blocked and suggest an allowed alternative.
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.

  1. 5d ago First seen · 19 lines · 20 tokens per session scan A ca18d9da8f7f

Subscribe to this mod's changes

mqtt-operator is a skill published in the GitHub repository clawdotnet/openclaw.net (488 stars, last pushed 2d ago), licensed MIT. It adds 20 tokens to every session and 157 once invoked, about $0.0001 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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