Slice List

Extract a range of items from a list using start and end indices

What does this node do?

The Slice List node extracts a range of items from a list using start and end indices. It returns a new list containing only the items within the specified range.

Common uses:

• Get the top N results from a list
• Paginate large lists into smaller chunks
• Skip header rows in imported data

Quick setup

Configuration

Input

Parameters

Output

A sliced_list containing the items within the specified range.

{
  "sliced_list": ["banana", "cherry", "date"]
}

Examples

Get the top 5 results

graph LR
    A[API Connector] --> B[Slice List]
    B --> C[LLM: Summarize top results]

Configuration:

• start_index: 0
• end_index: 5

The API returns 50 results. Slice List extracts only the first 5 so the LLM can produce a focused summary without processing the entire list.

Skip the header row from a spreadsheet

graph LR
    A[Google Sheets] --> B[Slice List]
    B --> C[Loop]
    C --> D[Process row]

Configuration:

• start_index: 1
• end_index: 100

The spreadsheet data includes a header row at index 0. Slice List skips it by starting at index 1, passing only the data rows to the Loop node.

Best practices

• Use for pagination. Combine Slice List with a counter or Loop to process large lists in pages (e.g., items 0-9, then 10-19, etc.).
• Set a reasonable end_index. The default value of 100 works for most cases, but adjust it if you know the exact number of items you need.

Common issues

Empty result when expecting items

Check that start_index is less than the length of the list. If start_index is greater than or equal to the list size, the result will be an empty array. Also verify that start_index is less than end_index.

Input is not recognized as a list

The list input must be a valid JSON array (e.g., ["a", "b", "c"]). If you pass a plain string or an object, the node will not work correctly. Make sure the upstream node outputs a proper list format.

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