create-heartbeat-monitor

create-heartbeat-monitor is a skill for Claude Code from uptimerobot/ai. It costs 37 tokens per session (820 once invoked), scanned A, original, MIT.

A tool for creating a UptimeRobot check for scheduled jobs, such as cron tasks, backups, or background workers. The job must periodically send a request to a generated URL; the check reports a problem when those signals stop.

In plain words
What is it for?
Use it to watch nightly backups, scheduled scripts, recurring data imports, and other tasks that should report in on a schedule.
Why use it?
It detects silent failures in jobs that may not have a public website for UptimeRobot to visit.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the uptimerobot plugin — 24 skills, 1 MCP server shipped together

Good fit Use it to watch nightly backups, scheduled scripts, recurring data imports, and other tasks that should report in on a schedule.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uptimerobot/ai/create-heartbeat-monitor
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.

Any agent
npx skills add uptimerobot/ai --skill create-heartbeat-monitor
Clone the repo
git clone --depth 1 https://github.com/uptimerobot/ai

Made for: Claude Code.

Or install uptimerobot, the plugin that ships this one along with the rest of its 24 skills, 1 MCP server.

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 create-heartbeat-monitor

README.md
[![agentmods](https://agentmods.dev/badge/skills/uptimerobot/ai/create-heartbeat-monitor/github.svg)](https://agentmods.dev/skills/uptimerobot/ai/create-heartbeat-monitor)
Your own site
<a href="https://agentmods.dev/skills/uptimerobot/ai/create-heartbeat-monitor"><img src="https://agentmods.dev/badge/skills/uptimerobot/ai/create-heartbeat-monitor/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 create-heartbeat-monitor

Your own site · 80×15
<a href="https://agentmods.dev/skills/uptimerobot/ai/create-heartbeat-monitor"><img src="https://agentmods.dev/badge/skills/uptimerobot/ai/create-heartbeat-monitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 820 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00037 $0.00820
Opus 5 $0.00018 $0.00410
Sonnet 5 $0.00007 $0.00164
Haiku 4.5 $0.00004 $0.00082

Measured 12d ago against content hash bd39d05df51e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

create-heartbeat-monitor 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 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.

Makes network callslowCapability

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

curl -fsS --retry 3 "https://heartbeat.uptimerobot.com/m800123456-abcd1234" > /dev/null
skills/create-heartbeat-monitor/SKILL.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create a HEARTBEAT monitor

Preflight — read first. If you cannot see any uptimerobot:* MCP tools in your tool list, invoke the uptimerobot:setup skill before doing anything else. Do not tell the user the MCP is misconfigured — setup's Step 0 detects the common case (server connected, tools loaded after session start) and resolves it without re-keying.

Use when the user wants to monitor a scheduled job / cron / background worker / backup script. The target system must send periodic HTTP requests to a URL that UptimeRobot generates. If pings stop arriving for longer than the interval (plus optional grace period), the monitor goes down.

This is the inverse of the other monitor types: UptimeRobot does not probe anything, it waits for incoming pings.

Tool: create-monitor Required params: friendlyName, type: "HEARTBEAT". Do not send url. The server generates it.

Minimal call

{
  "friendlyName": "Nightly DB backup",
  "type": "HEARTBEAT",
  "interval": 86400,
  "gracePeriod": 1800
}

The response includes the generated URL, shaped like:

https://heartbeat.uptimerobot.com/m<id>-<hash>

Show that URL to the user so they can wire it into their cron / job.

Common optional params

  • interval — how often the job is expected to ping (seconds, 30–86400). Required for this monitor to be useful; without it, defaults apply but may not match the user's schedule.
  • gracePeriod — seconds of tolerance past interval before marking down (0–86400). Use this for jobs with variable duration.
  • assignedAlertContacts, tagNames, maintenanceWindowsIds — same as other types.

Example: hourly job with 5-minute grace

{
  "friendlyName": "Hourly cache warmer",
  "type": "HEARTBEAT",
  "interval": 3600,
  "gracePeriod": 300,
  "assignedAlertContacts": [
    { "alertContactId": "10", "threshold": 0, "recurrence": 60 }
  ],
  "tagNames": ["jobs", "backend"]
}

Using the generated URL

The target job must hit the URL to signal "I ran successfully". Shell example:

Read the full file on GitHub · 84 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. 12d ago First seen · 84 lines · 37 tokens per session scan A bd39d05df51e

Subscribe to this mod's changes

create-heartbeat-monitor is a skill published in the GitHub repository uptimerobot/ai (24 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 820 once invoked, about $0.0002 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 2026-08-30.

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