n8n-validation-expert
Helps your agent understand and fix validation errors in an automation system. It explains what went wrong and how to fix it.
What it does
This guide helps you understand and fix errors that appear when you are building workflows in n8n. It explains what the errors mean and how to correct them.
When to use it
- ✓When n8n shows a validation error you don't understand.
- ✓If you need to fix an incorrect value in a workflow.
- ✓To resolve issues with expressions or when n8n asks you to fix something repeatedly.
Example of what to ask your AI
“Help me understand this n8n validation error: 'missing_required' in the 'email' field.”
Want more? Open the sections below.
How to use
The easiest way: copy the message below and paste it into Claude, ChatGPT, Cursor or any AI. It reads the skill and follows the instructions.
Skill link
Ready-to-paste message
How it works
It analyzes the errors n8n presents and offers clear explanations and steps to fix them. The goal is to make it easier to solve common n8n problems.
Installation
Easiest way: copy the skill link and paste it into Claude, ChatGPT or Cursor asking it to follow the instructions.
In the terminal (Claude Code, Codex, Cursor), in your project folder:
npx skills add sickn33/agentic-awesome-skills --skill n8n-validation-expertOr download just the file:
curl -L https://raw.githubusercontent.com/sickn33/agentic-awesome-skills/main/plugins/agentic-awesome-skills-claude/skills/n8n-validation-expert/SKILL.md -o SKILL.mdTechnical content (original SKILL.md)
Original text by the author, straight from GitHub.
n8n Validation Expert
Expert guide for interpreting and fixing n8n validation errors.
Detailed Guide
Read the detailed guide before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.
When to Use
- You need to interpret or fix validation errors in an n8n workflow.
- The task involves
missing_required,invalid_value, expression failures, or iterative validate-fix loops. - You want concrete remediation guidance for workflow validation output.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
FAQ
What is n8n?
n8n is a tool that helps connect different applications and automate tasks without needing to code.
What are validation errors?
These are warnings that appear when something is not configured correctly in a workflow, preventing it from working as intended.
Will this guide fix my workflow automatically?
No, it guides you on how you can fix the errors. The final correction is made by you.
Details
Original description by the author
Expert guide for interpreting and fixing n8n validation errors.
Popularity
- GitHub stars
- 48k
- Ranking position
- #3663
- License
- MIT
- Updated
- 10/15/2026
Comments
- …
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