# Publish Instagram carousel posts from product collections: n8n workflow

> Started by another system calling it, and works across Slack. 14 steps, 2 loops or waits: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/publish-instagram-carousel-posts-from-product-collections (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Alerts and monitoring](https://millionrounds.com/workflows?category=Alerts+and+monitoring#library)

# Publish Instagram carousel posts from product collections

Started by another system calling it, and works across Slack. 14 steps, 2 loops or waits: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpublish-instagram-carousel-posts-from-product-collections)

**14 steps** Medium: a working afternoon

**0** Branches: places the flow splits

**2** Loops or waits

**1** Service it connects to

## The flow

Starts it 2 Logic 6 Service 6

The steps in the order they run, from what starts it.

- 1 **Webhook Receive Payload1** Webhook *Starts it*
- 2 **Code Validate Payload1** Code *Logic*
- 3 **Code Build Caption1** Code *Logic*
- 4 **Split In Batches1** Split In Batches *Logic*
- 5 **HTTP Fetch Slide Image1** Http Request *Service*
- 6 **Code Aggregate Child IDs1** Code *Logic*
- 7 **Upload to URL1** Upload To Url *Service*
- 8 **IG Create Carousel Container1** Http Request *Service*
- 9 **Code Create Child Container1** Code *Logic*
- 10 **Wait IG Buffer1** Wait *Logic*
- 11 **IG Publish Carousel1** Http Request *Service*
- 12 **HTTP Fetch Post Metadata1** Http Request *Service*
- 13 **Slack Notify Team1** Slack *Service*
- 14 **Respond to Webhook1** Respond To Webhook *Starts it*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 14, 2 loops or waits
- **Size:** Medium: a working afternoon
- **Connects to:** Slack
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Slack account. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 14 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 14 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fpublish-instagram-carousel-posts-from-product-collections)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also alerts and monitoring, with the same services where possible, closest in size first.

- [**Aggregate tech trend signals from RSS feeds into Google Sheets** 14 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/aggregate-tech-trend-signals-from-rss-feeds-into-google-shee)
- [**Automated email follow-up system with CentralStationCRM** 14 steps · Gmail, Slack](https://millionrounds.com/workflow/automated-email-follow-up-system-with-centralstationcrm)
- [**Catch soft 404 and error pages from sitemaps** 14 steps · Google Sheets, Slack](https://millionrounds.com/workflow/catch-soft-404-and-error-pages-from-sitemaps)
- [**Check in participants with Google Sheets and Slack** 14 steps · Google Sheets, Slack](https://millionrounds.com/workflow/check-in-participants-with-google-sheets-and-slack)
- [**Competitive price monitoring & alerts with Bright Data** 14 steps · Email, Google Sheets](https://millionrounds.com/workflow/competitive-price-monitoring-and-alerts-with-bright-data)
- [**Create event recap Instagram carousels from photo dumps** 14 steps · Airtable, Slack](https://millionrounds.com/workflow/create-event-recap-instagram-carousels-from-photo-dumps)