AI: Conversational agent with custom tool written in JavaScript

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Built by n8n Team n8n Team
Created on June 05, 2026

Description

This workflow implements a custom tool via JavaScript code which returns a random color to users and excludes the given colors.

Note that to use this template, you need to be on n8n version 1.19.4 or later.

Nodes Used (3)

AI Agent
@n8n/n8n-nodes-langchain.agent
Code Tool
@n8n/n8n-nodes-langchain.toolCode
OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi