Diagnose n8n workflow errors with Claude AI, Supabase and Resend email alerts
UnknownUnknown. This template uses community nodes we can't verify statically. Uses community nodes that can't be verified statically (unverified community packages are off by default in 3.0). Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 24 nodes and runs when another workflow fails (error workflow). Along the way it connects Anthropic Chat Model, Supabase and Resend (community).
How it runs
Trigger: When another workflow fails (error workflow).
- Config - context (Edit Fields (Set)): sets 4 fields: technical_email, from_email, n8n_base_url…
- New error notification (Resend): uses Resend
- Code: runs custom JavaScript code
- HTTP Request: calls an HTTP API
- If: checks a condition and branches into true / false
- Supabase: get many
- Alert: context missing (Resend): uses Resend
- Code: runs custom JavaScript code
- Claude Diagnosis (AI Agent): runs an AI agent, with model: Sonnet 4.6 -, Haiku 4.5 fallback; output parser: Structured Output Parser
- Claude Scoring Judge (AI Agent): runs an AI agent, with model: Sonnet 4.6 -, Haiku 4.5 fallback; output parser: Structured Output Parser
…plus 7 more steps. See the full node list below.
Services it uses
Before you upgrade to n8n 3.0
We can't fully verify this one: it relies on 1 community package, and n8n 3.0 turns unverified community packages off by default (N8N_UNVERIFIED_PACKAGES_ENABLED=false).
- Check that n8n-nodes-resend is verified or supports 3.0 (used in New error notification, Full diagnosis email, Diagnosis with reservation email).
Nodes used (10)
- If
n8n-nodes-base.if - AI Agent
@n8n/n8n-nodes-langchain.agent - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Anthropic Chat Model
@n8n/n8n-nodes-langchain.lmChatAnthropic - Supabase
n8n-nodes-base.supabase - Code
n8n-nodes-base.code - Error Trigger
n8n-nodes-base.errorTrigger - HTTP Request
n8n-nodes-base.httpRequest - Resend
n8n-nodes-resend.resend - Edit Fields (Set)
n8n-nodes-base.set
From the author
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.…