Diagnose n8n workflow errors with Claude AI, Supabase and Resend email alerts
Who's it for This workflow is for anyone who runs n8n workflows and wants to know immediately when something breaks, without digging through execution logs. Especially useful for non-technical users and freelancers or agencies managing workflows for clients. How it works When a workflow fails, this system activates automatically. Claude AI analyzes the error using the technical details and the business context you provide, then generates a diagnosis with the direct cause, a step-by-step f
At a glance
Diagnose n8n workflow errors with Claude AI, Supabase and Resend email alerts is a ready-made n8n workflow you import as a workflow JSON file — no build required. It connects UNSUPPORTED_SLUG_FORMAT. It's free to download. Follow the 5-step import below to go live in minutes.
- Platform
- n8n
- Connects
- UNSUPPORTED_SLUG_FORMAT
- Modules
- 24
- Price
- Free
- Version
- v1.0

About this workflow
Who's it for This workflow is for anyone who runs n8n workflows and wants to know immediately when something breaks, without digging through execution logs. Especially useful for non-technical users and freelancers or agencies managing workflows for clients. How it works When a workflow fails, this system activates automatically. Claude AI analyzes the error using the technical details and the business context you provide, then generates a diagnosis with the direct cause, a step-by-step fix and prevention advice. A second AI agent validates the confidence score. Based on that score you receive a full diagnosis (≥80%), a diagnosis with a reservation (50–79%), or a manual review notification (<50%). All diagnoses are stored in your Supabase database. How to set up Run the provided SQL in Supabase to create the errorlog table. Verify your domain in Resend and create an API key. Import the workflow, create four credentials (Anthropic, Supabase, Resend, n8n API) and link them to the correct nodes. Fill in the Config node and activate the workflow. Set it as the Error Workflow for each workflow you want to monitor. Full installation guide at flowcheckers.com. Requirements Anthropic API key, Supabase account, Resend account with verified domain. How to customize Add workflow2, workflow3 etc. in the Config node for additional workflows. Adjust the email templates in the Resend nodes to match your branding. Need the full installation guide including SQL code? Download it free at flowcheckers.com
How to import this n8n workflow
- 1
Download the workflow JSON file after purchase.
- 2
Open n8n → click the menu → Import from File.
- 3
Select the downloaded JSON and import.
- 4
Set up credentials for each node that requires them.
- 5
Click Execute Workflow to test, then activate.
Setup guide
Setup guide included
Purchase to unlock the full step-by-step guide
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- JSON blueprint — instant download
- Setup guide PDF included
- 5 downloads · valid 30 days
- Works with n8n
Need help setting this up?
Book a 3-hour live setup session with an Agility consultant.
- Configure live on Google Meet / Zoom
- Free follow-up if workflow has defects
- Platform expert assigned to you