How do I format the current date in n8n?

n8n uses the Luxon library for dates. You can use expressions like {{$now.toFormat('yyyy-MM-dd')}} to generate formatted strings.

How do I access data from a Webhook node in n8n?

Webhook data is typically nested under the .body property. You should use {{$json.body.yourProperty}} rather than {{$json.yourProperty}} to correctly access the payload.

Can I use n8n expressions inside a Code node?

No. Code nodes use direct JavaScript. Access data using $json.variable or $input.item.json.variable without using the curly brace expression syntax.

Why isn't my n8n expression evaluating correctly?

The most common reasons include missing the double curly braces {{ }}, incorrect case sensitivity in node names, or failing to use bracket notation for node names that contain spaces.

How do I reference a node name that has spaces in an expression?

When a node name contains spaces, you must use bracket notation and quotes, such as {{$node["HTTP Request"].json.data}}.

n8n Expression Syntax Expert

Name: n8n Expression Syntax Expert
Author: AeyeOps

byAeyeOps

0•

Productivity & Workflow

Master the n8n expression language to map data, transform variables, and debug workflow evaluation failures using double-curly-brace syntax.

This skill provides comprehensive guidance on mastering n8n's expression language, enabling developers to accurately reference data across workflow nodes using double-curly-brace syntax. It covers critical patterns for accessing JSON outputs, referencing specific nodes with spaces or case-sensitive names, and correctly mapping nested webhook payloads. By providing clear rules for variable access, date manipulation via Luxon, and debugging common evaluation errors, this skill ensures robust and error-free automation logic within the n8n ecosystem.

Key Features

01Advanced data transformation rules using JavaScript methods and Luxon dates

02Comprehensive guide to double-curly-brace {{expression}} syntax and validation

03Deep dive into $json, $node, $now, and $env variable access patterns

04Critical troubleshooting for webhook data structures and .body property mapping

050 GitHub stars

06Standardized error handling for common 'undefined' and syntax evaluation failures

Use Cases

01Formatting dynamic timestamps and performing date math for automated notifications

02Extracting specific values from nested JSON arrays or objects in API responses

03Debugging 'undefined' errors when mapping data between complex n8n workflow nodes

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add aeyeops/aeo-skill-marketplace n8n-expression-syntax

For use in Claude.ai and ChatGPT

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