Code node

Overview

The Code node runs your JavaScript on the server in an isolated sandbox. Use it for deterministic transformations that would be awkward or unreliable with an LLM: parsing, filtering, math, reshaping JSON.

How it works

Your code is the body of a function:

Inputs arrive on a params object.
return a value to produce the node’s output. It must be JSON-serializable.

Params

Under Params, add keys and set each value to a literal or a / reference to an earlier node’s output. Inside your code, read them as params.<key>.

Result schema

Optionally describe the returned value’s shape under Result Schema so later nodes can reference its individual fields. Leave it as-is to keep the output an untyped object.

Example

With params orders (referencing an HTTP node’s response) and minTotal set to 100:

const big = params.orders.filter((o) => o.total >= Number(params.minTotal));

return {
  count: big.length,
  revenue: big.reduce((sum, o) => sum + o.total, 0),
  ids: big.map((o) => o.id),
};

Limits

Limit	Value
Runtime	Synchronous JavaScript only: no `await`, timers or promises.
Network and files	None. Use an HTTP node to fetch data, then pass it in as a param.
Timeout	10 seconds by default, up to 30 seconds.
Memory	64 MB.
Code size	64,000 characters.
Console output	`console.log` output is captured (up to 100 entries) to help you debug.

Debugging tips

Click Run in the workflow editor, enter test inputs, and open each node’s result to inspect what it received and returned.
Throw an Error with a clear message when input isn’t what you expect; the workflow stops and shows it.

Overview

Embed

Extend

Workflows

Overview

How it works

Params

Result schema

Example

Limits

Debugging tips

​Overview

​How it works

​Params

​Result schema

​Example

​Limits

​Debugging tips

Overview

How it works

Params

Result schema

Example

Limits

Debugging tips