n8n Node Guide: Code Tool

Description

AI & LangChain node in n8n.

What It Does

Agent-callable custom code (JS/Python).

When To Use It

Computation the LLM cannot do reliably: math, string ops, data transforms.

Key Parameters

Language, Input Schema (JSON), Description

Common Mistakes

Must return a STRING – returning an object breaks the agent with “wrong output type”.

Example

Agent + Code Tool (calculate discount) -> pricing assistant.

FAQ

Is this node included in n8n Community Edition?

Yes – Code Tool ships with the free Community Edition. No paid license needed.

Define the input schema so the agent knows what arguments to pass.?

Where does it fit in a workflow?

Code Tool works with any other node – connect it after a trigger or data node, and feed its output into the next step. Standard n8n data flow: trigger -> transform -> act.

Is support included?

Yes – message the seller through the store and I will help you wire this node.