Loop

Overview

The Loop step iterates over an array and executes nested child steps for each item. On the canvas, the loop appears as a container node — drag child steps inside it to define the logic that runs per iteration.

Configuration

Field	Description
Iterator Path	Path to the array to iterate over (template variable)
Mode	Sequential or Parallel. In Parallel, set a batch size (default `5`) to control how many items run concurrently.
Delay	Milliseconds to wait between iterations (Sequential) or between batches (Parallel)
Max Iterations	Maximum number of iterations (capped at 10,000)
Error Handling	Continue (skip failed items) or Stop. Stop only halts in Sequential mode — it breaks after the first failed item. In Parallel mode the remaining batches still run regardless of this setting.

Execution Modes

Mode	Description
Sequential	Items are processed one at a time in order
Parallel	Items are processed concurrently in batches. Set a batch size (default `5`) to control how many run at once. The delay applies between batches, not between individual items.

Accessing Loop Data

Inside child steps, use these template variables:

Variable	Description
`{{iteration.item}}`	The current item being processed
`{{iteration.item.field}}`	A specific field on the current item
`{{iteration.parent.*}}`	Parent loop context when loops are nested

Nesting Loops

Loops can be nested by placing one loop inside another on the canvas. Use {{iteration.parent.item}} to access the outer loop’s current item from within the inner loop. When dragging a step over overlapping loops, the canvas places it in the innermost loop automatically. You can also move a step from one loop to another at any time — drag it to the target loop and release when the loop highlights. To remove it from a loop, drag it outside the loop’s boundary.

Output

Field	Type	Description
`data`	array	Results from all iterations
`success`	boolean	`true` only when every iteration succeeded (no errors)
`success_count`	number	Number of successful iterations
`error_count`	number	Number of failed iterations
`error`	boolean \| null	The last iteration error, or `null` if none occurred
`error_message`	string \| null	Message from the last failed iteration, or `null` if none

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Overview

Configuration

Execution Modes

Accessing Loop Data

Nesting Loops

Output

​Overview

​Configuration

​Execution Modes

​Accessing Loop Data

​Nesting Loops

​Output

Overview

Configuration

Execution Modes

Accessing Loop Data

Nesting Loops

Output