How do I get alerted when an n8n workflow fails?
Add an HTTP Request node to your n8n error workflow that POSTs to your Agent Monitor failure ping URL. When the failure ping arrives, you get an email right away.
Get an email when an n8n workflow fails or stops running
An n8n workflow can break without anyone noticing. A trigger stops firing, a credential expires, or the error workflow you set up gets switched off. Nothing tells you until a client asks why their leads stopped.
Agent Monitor from Radar My Business watches your n8n workflows from the outside. Your workflow pings us when it finishes. If a failure ping comes in, or the expected run never shows up, we send you one email.
What you get
- A success ping URL and a failure ping URL for each workflow. GET and POST both work.
- An expected run interval and a grace period that you set, so a late run isn't flagged too early.
- Up, Late or Down status with the last ping time. Paused monitors show as Paused.
- One email alert when a run is missed or a failure ping arrives. No pile of repeat emails during the same outage.
- One recovery email when the next success ping comes in.
- Optional n8n API check. Add your public n8n URL, workflow ID and API key, and the daily check also reads your recent successful and failed executions. Private hosts are refused and your key is stored encrypted.
How to set it up in n8n
Step 01
Add a monitor. In Radar My Business, open Agent Monitor, choose n8n, and set how often the workflow should run plus a grace period.
Step 02
Copy your two links. You get a success ping URL and a failure ping URL.
Step 03
Add a success ping at the end of your workflow. Add an HTTP Request node:
- Method:
POST - URL: your success ping URL (
https://radarmybusiness.com/api/agent-monitor/ping/<your-token>)
- Method:
Step 04
Add a failure ping to your error workflow. In the error workflow, add another HTTP Request node:
- Method:
POST - URL: your failure ping URL (
https://radarmybusiness.com/api/agent-monitor/ping/<your-token>/fail)
- Method:
Step 05
Run it once. The monitor shows Up with the last ping time.
Why a ping catches what n8n's error workflow misses
n8n's Error Trigger only runs when a workflow starts and then errors. It can't tell you about a workflow that never ran, and it does nothing if the error workflow is off. A success ping flips that around: if the ping doesn't arrive inside your interval and grace period, the run counts as missed.
Failure pings alert right away. Missed runs are checked once a day at 14:10 UTC (7:10 AM Pacific), so this is a daily safety net for silent failures, not a minute-by-minute pager.
FAQ
Will I know if a workflow stops running completely?
Yes. Set an expected run interval and grace period. If no success ping arrives in that window, the monitor goes Late, then Down, and you get one email. Missed runs are checked once a day at 14:10 UTC (7:10 AM Pacific).
Do I need to install an n8n community node?
No. Setup uses n8n's built-in HTTP Request node. There's no separate node to install.
Where do alerts go?
Email. You get one email when something goes wrong and one when it recovers. Email is the only alert channel right now.
Does it work with Make and Zapier too?
Yes. The same ping links work with a Make HTTP module and Webhooks by Zapier. For Make and Zapier, monitoring is ping-only.
What does it cost?
Agent Monitor is included in every Radar My Business plan: Starter ($29/month, 5 monitors), Pro ($79/month, 25 monitors) and Agency ($199/month, 100 monitors). Starter comes with a 7-day free trial and no card. Pro and Agency are paid plans.
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