How to Add WooCommerce Customers to Mailchimp Audience with N8n

Workflows > + New Workflow

Create New N8n Workflow

Start a blank workflow in N8n to handle WooCommerce webhook data. This will be triggered every time an order status changes to 'completed'.

1. 1Click 'New Workflow' from the N8n dashboard
2. 2Name it 'WooCommerce to Mailchimp Customer Sync'
3. 3Click 'Save' to create the workflow

Trigger Nodes > Webhook

Add Webhook Trigger Node

Configure the webhook trigger to receive WooCommerce order completion events. This creates the endpoint URL that WooCommerce will ping.

1. 1Click the + button next to the Start node
2. 2Search for 'Webhook' and select it
3. 3Set HTTP Method to 'POST'
4. 4Copy the Production URL shown in the node

WooCommerce > Settings > Advanced > Webhooks

Configure WooCommerce Webhook

Set up WooCommerce to send order data to your N8n webhook when orders are marked complete.

1. 1Go to WooCommerce > Settings > Advanced > Webhooks
2. 2Click 'Add webhook'
3. 3Set Topic to 'Order updated'
4. 4Paste your N8n webhook URL in Delivery URL
5. 5Set Status to 'Active' and save

Logic > IF

Add Order Status Filter

Filter webhooks to only process completed orders. WooCommerce sends updates for every status change, but you only want 'completed' orders.

1. 1Add an IF node after the webhook
2. 2Set condition to 'String equals'
3. 3Set Value 1 to '{{ $json.status }}'
4. 4Set Value 2 to 'completed'

Data Transformation > Set

Extract Customer Data

Pull customer email, name, and order details from the webhook payload. This data will be sent to Mailchimp for audience segmentation.

1. 1Add a Set node after the IF 'true' path
2. 2Add field 'email' with value '{{ $json.billing.email }}'
3. 3Add field 'firstName' with value '{{ $json.billing.first_name }}'
4. 4Add field 'lastName' with value '{{ $json.billing.last_name }}'
5. 5Add field 'orderTotal' with value '{{ $json.total }}'

Data Transformation > Set

Calculate Order Value Tier

Categorize customers by order value to create targeted segments in Mailchimp. This enables different email campaigns for high-value vs low-value customers.

1. 1Add another Set node after the first Set node
2. 2Add field 'valueTier' with expression '{{ $json.orderTotal > 100 ? "high-value" : "standard" }}'
3. 3Test the expression with sample data
4. 4Verify the tier calculation works correctly

Code > Function

Extract Product Categories

Get product category names from the order line items. These become tags in Mailchimp for product-based email segmentation.

1. 1Add a Function node after the Set node
2. 2Paste code to loop through line_items array
3. 3Extract category names from each product
4. 4Return comma-separated category string

Marketing > Mailchimp

Connect to Mailchimp

Add your Mailchimp credentials to N8n. You'll need an API key from your Mailchimp account settings.

1. 1Add a Mailchimp node to the workflow
2. 2Click 'Create New' next to Credentials
3. 3Enter your Mailchimp API key
4. 4Click 'Test' to verify connection
5. 5Select 'Add/Update Contact' operation

Mailchimp Node > Parameters

Configure Audience Selection

Choose which Mailchimp audience receives the new customers. Map the customer data to the correct fields in Mailchimp.

1. 1Select your target audience from the dropdown
2. 2Set Email Address to '{{ $json.email }}'
3. 3Set Status to 'subscribed'
4. 4Enable 'Update Existing' to handle repeat customers
5. 5Map First Name and Last Name fields

Mailchimp Node > Tags

Add Customer Tags

Apply tags based on order value tier and product categories. This allows targeted email campaigns in Mailchimp.

1. 1Scroll to Tags section in the Mailchimp node
2. 2Add tag for value tier: '{{ $json.valueTier }}'
3. 3Add tag for categories: '{{ $json.categories }}'
4. 4Enable 'Replace Tags' to avoid tag accumulation

Workflow > Execute

Test the Complete Workflow

Run an end-to-end test with real order data to verify the integration works correctly before going live.

1. 1Click 'Execute Workflow' button
2. 2Place a test order in WooCommerce
3. 3Mark the order as 'completed'
4. 4Check each node's output data
5. 5Verify the customer appears in Mailchimp with correct tags

Workflow Settings > Active

Activate Production Mode

Enable the workflow to run automatically for all future completed orders. Set up error handling for failed API calls.

1. 1Toggle the workflow to 'Active' status
2. 2Add error handling to the Mailchimp node
3. 3Set retry count to 3 attempts
4. 4Configure failure notifications if needed
5. 5Save all changes

Drop this into an n8n Code node.

// Extract unique categories from WooCommerce line items
const items = $json.line_items || [];
const categories = new Set();

// Extract unique categories from WooCommerce line items
const items = $json.line_items || [];
const categories = new Set();

for (const item of items) {
  if (item.meta_data) {
    const categoryMeta = item.meta_data.find(m => m.key === '_product_cat');
    if (categoryMeta) {
      categories.add(categoryMeta.value);
    }
  }
}

return { categories: Array.from(categories).join(',') };