n8n-expression-syntax

Fix common n8n expression syntax errors by validating core variables like $json, $node, and $env. This guide identifies 15 frequent mistakes and provides a quick reference table to resolve webhook data structure issues and optimize workflow expressions.

Accessing webhook data in n8n expressions requires understanding the specific webhook data structure. This guide explains how to correctly reference webhook payloads using proper expression syntax to prevent data extraction errors in your workflows.

Use $json and $node variables in n8n workflow expressions to extract and manipulate data between nodes. This skill provides real-world examples and best practices for correctly implementing these core variables in your automation workflows.

This n8n expression guide covers environment variables like $env and $now, detailing their correct syntax and usage. It includes advanced techniques and best practices for incorporating these dynamic variables into your workflow expressions.

Common mistakes when writing n8n expressions include incorrect variable referencing and improper webhook data handling. This skill outlines 15 frequent errors with real examples from MCP testing and offers quick fixes to prevent workflow failures.