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n8n-loops-official

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Use when working with multi-item data, batches, paginated APIs, rate-limited APIs, fan-out across multiple branches, anything that needs to "do this for each", or any time the user mentions looping, iterating, batching, paging, parallelism, or "loop over items". Triggers on "loop", "iterate", "for each", "batch", "page through", "paginate", "rate limit", "process all", "fan-out", "parallel branches", "concurrency", or any node that should run once vs once-per-item.

skills/n8n-loops-official/SKILL.md

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Nov 10, 2026
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Apache-2.0

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# n8n Loops

Three meanings of "loop" map to three mechanisms:

1. **"Run this node for every item."** Default. Most nodes loop automatically, so do nothing.
2. **"Run this node *once* with all items, not once per item."** The `executeOnce` setting (single boolean).
3. **"Process items in explicit batches with control flow between iterations."** The `Loop Over Items` node (formerly `Split In Batches`).

For paginated APIs, the HTTP Request node has built-in pagination. Almost always preferable to a hand-built page-counting loop.

## The model: items are an array

Data flows between nodes as an array of items, each `{ json: {...}, binary?: {...} }`. 50 items = 50-entry array.
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