Resilient HTTP + Error Handler
Attach an Error Handler node to an HTTP call and Slack-notify your team the moment a request fails.
The full canvas, before you import it
Click any node to see its config.
Click a node to select it — same as the Heym editor; the panel shows its settings.
5 nodes · Free & source-available
Resilient HTTP + Error Handler
Production workflows need fallback paths. The Error Handler node fires when any upstream node throws — here it catches HTTP failures and alerts your team before the error silently disappears.
Built from the walkthrough in LLM Cost Alerts: Why Static Thresholds Break, which covers the other half of the problem: the windowed thresholds that tell you when failures stop being one-offs.
What this workflow does
- Input provides the target URL (or replace with a Cron trigger)
- HTTP makes the request — if it succeeds, the happy path continues to Output
- Error Handler (attached to the HTTP node) intercepts any exception
- Slack sends an error alert with the failure reason
Use cases
- Monitoring critical API integrations
- Webhook delivery receipts with failure alerts
- Teaching defensive workflow design
Notes
Connect the Error Handler node to the HTTP node using the error handle. Attach Slack credentials in Heym — no secrets ship in the template.
How to import this template
- 1Click Import → Copy JSON on this page.
- 2Open your Heym and navigate to a workflow canvas.
- 3PressCmd+V/Ctrl+V— nodes appear instantly.
- 4Add your API keys in the node config panels and click Run.
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