Cronping
A dead-man's-switch / heartbeat monitor for AI agent loops, cron jobs, backups and workers. Create a check with no account, drop the ping URL in your job, and if a ping does not arrive on time Cronping emails you. Also does pull checks (it fetches a URL on your schedule) and stuck/zombie-run detection. Genuinely free: 20 checks, 1-minute resolution, full history, no card.
How to connect
https://cronping.cronping-oren.workers.dev/mcp
tools/list returns the expected tools before relying on them in production.Tools
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create_heartbeatCreate a Cronping heartbeat monitor (dead-man's-switch). Returns a ping_url to call on each successful run of your agent loop, worker, or cron job, plus a claim_token to manage it. If pings stop arriving within period+grace, Cronping raises an alert. No account required. After creating, send one verification ping (call ping_heartbeat with the returned id) to confirm setup — the check flips from 'new' to UP so you know it's wired correctly. Alternatively, pass pull_url to make a PULL check: Cronp
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ping_heartbeatSend a heartbeat signal to a Cronping check. signal="success" (default) marks it UP and resets the timer; "start" records that a run began (for duration); "fail" marks it DOWN immediately and alerts. Optionally pass progress_token (a digest of your run's actual output) on success pings: if the same token repeats for several consecutive runs, the check flips to STUCK — catching a "zombie" job that keeps pinging on schedule while its real work has stalled.
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get_heartbeat_statusGet the live status of a Cronping check (up/down/new, last ping time, ping count, and whether an alert channel is set).
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set_heartbeat_alertAdd or change the alert channel on an EXISTING Cronping check (use this instead of creating a duplicate). Sets the email and/or webhook (Slack/Discord/generic https) that Cronping notifies when the monitor goes silent or recovers. Without an alert channel a check tracks status but can't warn you — call this once per check to make the dead-man's-switch actually protect you.