Qe N8N Expression Testing
Validates complex query expression logic against a test suite to ensure accurate data retrieval in backend systems.
Install on your platform
We auto-selected Claude Code based on this skill’s supported platforms.
Run in terminal (recommended)
claude mcp add qe-n8n-expression-testing npx -- -y @trustedskills/qe-n8n-expression-testing
Or manually add to ~/.claude/settings.json
{
"mcpServers": {
"qe-n8n-expression-testing": {
"command": "npx",
"args": [
"-y",
"@trustedskills/qe-n8n-expression-testing"
]
}
}
}Requires Claude Code (claude CLI). Run claude --version to verify your install.
About This Skill
What it does
This skill allows an AI agent to test n8n expressions for validity and potential errors. It can evaluate whether an expression will parse correctly, and potentially identify common mistakes before they cause issues in a workflow. The skill aims to improve the reliability of automated processes built with n8n.
When to use it
- Workflow Development: Validate complex expressions during the creation or modification of n8n workflows.
- Debugging Existing Workflows: Quickly check if an expression is causing errors without running the entire workflow.
- Expression Library Maintenance: Ensure that expressions in a reusable library remain valid and functional over time.
- Automated Testing: Integrate into automated testing pipelines to proactively identify issues with n8n workflows.
Key capabilities
- Expression parsing validation
- Error identification within expressions
- Workflow reliability improvement
Example prompts
- "Test this expression:
{{$json.someValue + 1}}" - "Validate the following n8n expression for errors:
moment(item.date).add(1, 'day').format('YYYY-MM-DD')" - "Can you check if this expression is valid:
[[getItemFromList("users", {id: item.userId})]]"
Tips & gotchas
The skill's effectiveness depends on the complexity and accuracy of the provided n8n expressions. It’s best used in conjunction with thorough testing of complete workflows to ensure expected behavior.
Tags
TrustedSkills Verification
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Security Audits
| Gen Agent Trust Hub | Pass |
| Socket | Pass |
| Snyk | Pass |
🌐 Community
Passed automated security scans.