uptime-check

uptime-check is a command for Claude Code from alifanov/darkflow. It costs 26 tokens per session (1,916 once invoked), scanned A, original, MIT.

A website availability check that tests domain lookup, the web response, and whether the page contains real content.

In plain words
What is it for?
Checking a configured website and creating an urgent repair task when DNS, HTTP, or page content checks fail.
Why use it?
It distinguishes a working site from one that only responds technically but shows an error, blank page, or maintenance screen.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

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 commands/alifanov/darkflow/uptime-check
Clone the repo
git clone --depth 1 https://github.com/alifanov/darkflow

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 uptime-check

README.md
[![agentmods](https://agentmods.dev/badge/commands/alifanov/darkflow/uptime-check.svg)](https://agentmods.dev/commands/alifanov/darkflow/uptime-check)
Your own site
<a href="https://agentmods.dev/commands/alifanov/darkflow/uptime-check"><img src="https://agentmods.dev/badge/commands/alifanov/darkflow/uptime-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,916 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 5.1 $0.00026 $0.01916
Opus 5 $0.00013 $0.00958
Sonnet 5 $0.00005 $0.00383
Haiku 4.5 $0.00003 $0.00192

Measured 6d ago against content hash c7716922cea4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

uptime-check scanned grade A with 1 finding 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 6d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

> **Note — cheap pre-flight.** The dispatcher (`darkflow-run.sh`) runs a fast bash `curl` probe *before* launching this agent. On the common happy path (site returns 2xx with a real body) it writes the snapshot + metrics
templates/.claude/commands/darkflow/uptime-check.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Check whether this project's website is actually up: resolve DNS, hit the URL, verify the HTTP status is healthy, and confirm the page really loads (not a blank/error/maintenance page). If the site is down or broken, create an auto-approved critical-priority task so fix-issues picks it up immediately and restores it.

This is an active health check: when the site is healthy it does nothing but write a snapshot. When the site is broken it files a critical, auto-approved task describing exactly what failed (DNS, HTTP status, or empty/error body) so the fix can start without waiting for human triage.

Note — cheap pre-flight. The dispatcher (darkflow-run.sh) runs a fast bash curl probe before launching this agent. On the common happy path (site returns 2xx with a real body) it writes the snapshot + metrics itself and skips this agent entirely — so on healthy runs you are not invoked at all. This agent runs only when the probe finds the site down/broken or can't decide (no site_url, DNS failure, etc.). When you are invoked, perform the full check below from scratch (the probe is only a coarse filter) and file the issue.

Step 1 — Read project config

Load the project config (contract in .darkflow.d/claude.mdProject config). Uses: domain, language.

Step 2 — Resolve the URL to check

If domain is set, use it. Otherwise, auto-discover the production URL from the project (first match wins):

  • Coolify: coolify app list then the app's FQDN/domain (if the coolify CLI is configured)
  • vercel.json / .vercel/project.json production domain
  • netlify.toml site URL
  • CNAME file (GitHub Pages custom domain)
  • package.jsonhomepage
  • A production URL stated in README.md or docs/

If a URL is found this way, persist it for next time:

grep -q "^site_url=" .darkflow || echo "site_url=<discovered-url>" >> .darkflow

If no URL can be determined at all, do not create an issue. Output uptime-check: no site_url configured and none discoverable — skipping and still write the snapshot (Step 5) noting that the target is unknown. Done.

Read the full file on GitHub · 150 lines

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. 6d ago First seen · 150 lines · 26 tokens per session scan A c7716922cea4

Subscribe to this mod's changes

uptime-check is a command published in the GitHub repository alifanov/darkflow (2 stars, last pushed 6d ago), licensed MIT. It adds 26 tokens to every session and 1,916 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.