n8n for E-commerce: Automatic Orders, Stock and Post-Sale

If every sale in your store sets off a chain of manual tasks —ping the customer on WhatsApp, deduct stock in the spreadsheet, remember to ask for the review—, you're paying an invisible employee with your own time. n8n for e-commerce lets you connect Shopify and Tienda Nube with WhatsApp, spreadsheets and your management system so that orders, stock alerts and post-sale tasks run on their own. Tienda Nube has no native node in n8n, but its REST API integrates perfectly with the HTTP Request node and webhooks. In this guide: the connection step by step and the five workflows that move the needle most on sales.

Why Tienda Nube + n8n (what the English tutorials ignore)

English-language blogs cover Shopify and WooCommerce to exhaustion, but in Argentina and much of LATAM the dominant player among SMBs is Tienda Nube (Nuvemshop in Brazil). And its app ecosystem, while it has grown, is still thin for serious automation: each app solves one specific case and each one charges its own monthly fee.

With n8n, by contrast, a single tool orchestrates everything: the Tienda Nube API is complete, stable and well documented. You just have to talk to it "by hand."

How to use the Tienda Nube API from n8n (no native node)

This is what no one explains in Spanish, so let's get to the point:

1. Create an app in the Tienda Nube Partners panel (partners.tiendanube.com). For your own use, a private app linked to your store is enough.
2. Get the access token by completing the OAuth flow once. The Tienda Nube token does not expire as long as the app stays installed, which simplifies everything: you save it as a credential in n8n and you're done.
3. Configure the HTTP Request node in n8n:
   • Base URL: https://api.tiendanube.com/v1/{store_id}/...
   • Header Authentication: bearer {access_token} (watch out: Tienda Nube uses Authentication, not the standard Authorization header — the number-one beginner mistake).
   • Header User-Agent with your app name and an email (the API requires it; without it you get an error).
4. Register webhooks with a POST to /webhooks specifying the event (order/created, order/paid, product/updated) and the URL of your workflow's Webhook Trigger in n8n.

With that, every new order reaches n8n in real time with the full JSON: customer, products, amounts, payment method and shipping. If the word "webhook" still sounds like Greek to you, first read what a webhook is in n8n.

And Shopify? Easier: n8n ships a native node with triggers and actions. You create a custom app in the Shopify admin, copy the credentials, and in 10 minutes it's running. That's why this guide spends more space on Tienda Nube: that's where the real friction is.

The 5 workflows prioritized by sales impact

This is the order we recommend implementing, based on what we've seen work in stores across the region:

#	Workflow	Sales impact	Effort	Why first
1	WhatsApp order alert	High	Low	Cuts "did my order ship?" and cancellations
2	Abandoned-cart recovery	High	Medium	Recovers 5-12% of lost carts
3	Post-delivery review request	High (medium term)	Low	Reviews lift conversion 10-25%
4	Low-stock alert	Medium	Low	Stops you selling what you don't have
5	Sales sync → spreadsheet/ERP	Medium	Medium	Kills manual entry and typing errors

1. WhatsApp order alert (to the customer and the team)

Trigger: webhook order/paid → n8n assembles the message with the order number, products and delivery window → sends it through the WhatsApp Business API. The customer gets instant confirmation and your warehouse team sees the order in their group without opening the dashboard. An apparel store that automated this cut "when will it arrive?" inquiries by roughly 40%. The step by step for the messaging part is in automating WhatsApp with n8n.

2. Abandoned-cart recovery

Tienda Nube exposes abandoned checkouts via API (/checkouts). A scheduled workflow queries them every hour, waits a sensible window (2-4 hours from abandonment) and fires a message with a direct link back to the cart. With a small 5-10% discount, realistic recovery rates run 5 to 12% — across hundreds of carts a month, that's real money.

3. Post-delivery review request

Trigger: the order moves to delivered status (a webhook from the store, or from the carrier if you integrate it) → n8n waits 3 days → sends an email or WhatsApp asking for the review with a direct link. The key is timing: ask for the review when the product has already been used, not when it just left the warehouse.

4. Low-stock alert

A scheduled workflow every morning: queries /products with their variants, filters those with stock below your threshold (configurable per product in a spreadsheet) and sends a summary to whoever handles purchasing. Advanced version: if the supplier has an online catalog, n8n attaches the restock link.

5. Sync with a spreadsheet or management system

Every sale records itself in Google Sheets or your ERP: date, products, amounts, payment method, shipping cost. It's the least flashy workflow and the one accountants are most grateful for. How to master the spreadsheet part: n8n and Google Sheets.

Has your e-commerce operation outgrown doing it by hand? Book a 30-minute call and we'll show you what to automate first based on your volume.

What it costs to keep this running

• n8n: USD 0 self-hosted (plus a VPS at ~USD 10/month) or from USD 24/month in cloud.
• WhatsApp Business API: business-initiated conversations cost cents; a volume of 1,000 monthly notifications runs USD 10-30 depending on the country.
• Professional build: putting together the 5 workflows with error handling and monitoring runs USD 800-3,000 one time, depending on how much integration with in-house systems is involved. If your case calls for touching ERP or invoicing APIs, our API and integration development service comes into play.

When automating your store with n8n is NOT worth it

• Fewer than ~100 orders a month: the time it saves doesn't even justify the setup. Focus on selling more first.
• If all you want is abandoned-cart emails, the native Tienda Nube or Shopify apps solve it for a few dollars a month without touching anything technical.
• If your catalog and stock live in a closed system with no API, you first have to solve that data access — sometimes with custom software that exposes the information — and only then automate on top.
• If there's no one watching the errors. A notification workflow that fails silently is worse than not having it: customers wait for the message that never comes.

Start with the workflow that touches money

Our recommendation if you're starting solo: implement the WhatsApp order alert first (an afternoon of work) and measure the drop in repeat inquiries. That result funds the rest of the roadmap. And if you'd rather we build it with you: at Deepyze we integrate Tienda Nube, Shopify, WhatsApp and management systems with n8n and AI applied to your business for stores across LATAM — including sales and post-sale chatbots wired to your real stock. Fixed price, proposal in 24 hours and a team in your time zone: tell us about your case here.