N8N Expression Syntax

Name: N8N Expression Syntax
Author: czlonkowski

Checked

czlonkowski·vlatest·productivity·MIT

This skill teaches you N8N's expression syntax for building powerful workflows by defining data transformations and logic within your nodes.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

Run this in your project

terminal

$ npx skills add czlonkowski/n8n-skills --skill n8n-expression-syntax -a claude-code

Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

czlonkowski

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned 28 Sept 2026

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

Declares what it does: passed
SKILL.md parses and declares a name and a description.
SKILL.md exists, its frontmatter parses, and it declares a name and a description.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
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No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned czlonkowski/n8n-skills at 19cd793f47.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit: 19cd793f47
Manifest: skills/n8n-expression-syntax/SKILL.md
Scanned: 4 files, 1,457 lines

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What each check looks for →

About this skill

What it does

This skill provides syntax support for expressions used in n8n workflows, enabling users to write and evaluate dynamic logic within automation processes. It allows for conditional checks, data transformations, and complex evaluations using JavaScript-like syntax.

When to use it

When building dynamic workflow conditions based on input data
To perform calculations or string manipulations during node execution
When creating reusable expression templates across multiple workflows

Key capabilities

Support for JavaScript expressions within n8n nodes
Access to global variables and item data in expressions
Ability to use logical operators, functions, and control structures

Example prompts

"Check if the value of 'status' is equal to 'completed'"
"Format a date string using the current timestamp"
"Calculate the sum of two fields from the input data"

Tips & gotchas

Ensure expressions are properly enclosed in double curly braces {{ }} when used in n8n.
Be cautious with complex logic to avoid performance issues or unintended side effects.