isdown

isdown is a command for Claude Code from danielmiessler/LifeOS. It costs 42 tokens per session (195 once invoked), scanned A, original, MIT.

A command that checks whether a website is reachable from your computer and, optionally, from seven worldwide locations.

In plain words
What is it for?
Use it to investigate website outages, compare local and worldwide access, and check possible local causes such as DNS, VPN, hosts-file, or router problems.
Why use it?
It separates a local connection problem from an outage affecting everyone, with probe results to support the verdict.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: reads .claude/ paths.

Good fit Use it to investigate website outages, compare local and worldwide access, and check possible local causes such as DNS, VPN, hosts-file, or router problems.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/danielmiessler/lifeos/isdown
About the project

LifeOS is an AI-assisted personal operating system that records a person’s goals, values, context, and current situation to help move them toward a desired future state. It supports work such as building applications, starting businesses, and creative projects. Its catalogue entries extend the system through skills, hooks, agents, and commands.

danielmiessler/LifeOS · 19,457 stars · on GitHub · ourlifeos.ai

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/danielmiessler/LifeOS

Made for: Claude Code.

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 isdown

README.md
[![agentmods](https://agentmods.dev/badge/commands/danielmiessler/lifeos/isdown/github.svg)](https://agentmods.dev/commands/danielmiessler/lifeos/isdown)
Your own site
<a href="https://agentmods.dev/commands/danielmiessler/lifeos/isdown"><img src="https://agentmods.dev/badge/commands/danielmiessler/lifeos/isdown/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.

agentmods 80×15 button for isdown

Your own site · 80×15
<a href="https://agentmods.dev/commands/danielmiessler/lifeos/isdown"><img src="https://agentmods.dev/badge/commands/danielmiessler/lifeos/isdown.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 195 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00042 $0.00195
Opus 5.5 $0.00017 $0.00078
Sonnet 5.5 $0.00008 $0.00039
Haiku 4.5 $0.00004 $0.00019

Measured 1mo ago against content hash 82792e4a920d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

isdown 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 1mo 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.

LifeOS/install/commands/isdown.md · 18 lines

What it actually says

/isdown — Is this site down, or is it just me?

Thin invoker for LIFEOS/TOOLS/IsDown.ts.

bun ~/.claude/LIFEOS/TOOLS/IsDown.ts $ARGUMENTS

Exit codes: 0 up everywhere · 1 down for everyone · 2 down just for you · 3 probe error.

Report the verdict line and the per-probe evidence. If the verdict is just-you, suggest the usual local culprits (DNS cache, VPN, hosts file, router). If --deep was passed, include the per-node table.

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. 1mo ago First seen · 18 lines · 42 tokens per session scan A 82792e4a920d

Subscribe to this mod's changes

isdown is a command published in the GitHub repository danielmiessler/LifeOS (19,457 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 195 once invoked, about $0.0002 per session on Opus 5.5. 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.