01
Create an agent
Name it, set every 30 minutes or a cron expression, and choose a grace period. You get a secret URL.
Healthchecks for AI agents
Know when an agent goes quiet.
StaleAgent is a dead-man's switch for scheduled agents — Claude Code, Codex, or a script of your own. Each agent gets a ping URL. If the ping does not arrive, you get one alert. When it recovers, you get one more.
The open-source wrapper sends exit code, duration, byte counts, and a hash of stdout. It never sends the prompt, the output, environment variables, or API keys.
01 — Setup
A ping URL, then whatever already runs the job.
02
Ping it
curl the URL from cron, or wrap the command: staleagent run <token> -- claude -p "triage inbox"
03
Get one email
Missed, failed, empty, too slow, too expensive, or stuck repeating itself. A recovery note when it is healthy again.
02 — Alerts
Six ways a scheduled agent goes stale.
Missed run
No start or success ping by the schedule plus grace.
Failed
A /fail ping, or an exit code that is not zero.
Empty output
A successful run that reports zero bytes.
Runtime
A run still open, or finished, past the limit you set.
Cost
One run, or the last 24 hours, over the limit you set.
Loop
The same stdout hash several times in a row, or pings far faster than the schedule.
03 — Privacy
Metadata in. Prompts stay on the machine.
What we store
- Ping time and schedule
- Exit code
- Duration
- Stdout and stderr size in bytes
- SHA-256 of stdout, used only to spot repeated output
- Optional token counts and cost, if you or the CLI report them
What we never receive
- Prompts
- Model outputs
- Environment variables
- API keys
- Files
The hash cannot be turned back into the output. Turn it off with --no-hash.
04 — Pricing
Free for three agents. Paid plans are coming soon.
Billing is not switched on. New accounts are on Free. The alert rules above already run.
Free
$0
- 3 agents
- Email alerts
- Missed, failed, empty, and runtime rules
- 7-day history
Solo
$6/mo
- 25 agents
- All alert channels
- Cost and loop rules
- Daily digest and 30-day history
Pro
$12/mo
- 100 agents
- Team members
- 90-day history
- Status page and API keys