n8n-node-expert

Name: n8n-node-expert
Availability: InStock
Author: gerardloupecyb

Configures n8n nodes, debugs expressions like $json/$node/$now, and resolves validation errors.

1|Updated Mar 7, 2026

Search Tags:#automation #workflow #debugging #configuration #n8n #expressions

Ready to run

npx skills add https://github.com/gerardloupecyb/skills --skill n8n-node-expert

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: n8n-node-expert
Source: https://github.com/gerardloupecyb/skills/tree/main/n8n-node-expert
Command: npx skills add https://github.com/gerardloupecyb/skills --skill n8n-node-expert

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you configure n8n nodes correctly, write complex expressions, and resolve validation errors, ensuring your automations run smoothly and efficiently.

Core Features & Use Cases

Node Configuration: Understand and set parameters for any n8n node.
Expression Debugging: Write and fix dynamic expressions using $json, $node, and $now.
Validation Error Resolution: Interpret and fix missing_required, invalid_value, and type_mismatch errors.
Use Case: You're building an n8n workflow and are stuck because a node keeps throwing a "missing required field" error, or your expression {{$json.body.user_id}} isn't returning the expected value. This Skill will guide you through the configuration and expression syntax to fix it.

Quick Start

Use the n8n-node-expert skill to help me fix the 'missing_required' error on my Slack node.

Frequently Asked Questions about n8n-node-expert

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I fix a missing_required validation error on an n8n node?▼

To fix a missing_required error on an n8n node, you must locate the empty parameter field and provide a valid input value. This Skill helps identify missing parameters and resolve validation issues by checking property dependencies like displayOptions.

Why does my n8n expression using $json return an unexpected value?▼

An n8n expression using $json returns unexpected values when the referenced data path is incorrect or the preceding node outputs a different structure. You can debug expression syntax by verifying the exact JSON hierarchy being passed into the current node.

What do the different n8n validation profiles like minimal and strict mean?▼

n8n validation profiles like minimal, runtime, ai-friendly, and strict define the strictness level for checking node parameters. They determine how strictly the system validates inputs before execution, catching issues like invalid_value or type_mismatch errors at different stages.

How do I resolve a type_mismatch error when configuring n8n workflow parameters?▼

Resolving a type_mismatch error in n8n involves ensuring the parameter receives the exact data type it expects, such as changing a string to a number. This Skill guides you through adjusting parameter configuration and expression syntax to match required types.

Can I use $now and $node variables together in n8n expressions?▼

You can use $now and $node variables together within n8n expressions to combine dynamic timestamps with data from previous nodes. This Skill provides guidance on writing and debugging complex syntax using these built-in expression variables.