Magento Tree Planting Integration: Add Reforestation to Your Store (2026)

1. Register the event in events.xml

<!-- app/code/YourVendor/OneClickImpact/etc/events.xml -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="sales_order_invoice_pay">
        <observer name="oneclickimpact_plant_tree"
                  instance="YourVendor\OneClickImpact\Observer\PlantTreeOnPaid" />
    </event>
</config>

2. Write the observer

sales_order_invoice_pay fires once per invoice payment, so a small per-invoice guard is enough to avoid double-planting on re-saves. We tag the call with metadata.order_id so every tree is traceable back to its Magento order in your 1ClickImpact dashboard.

<?php
namespace YourVendor\OneClickImpact\Observer;

use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\HTTP\Client\Curl;

class PlantTreeOnPaid implements ObserverInterface
{
    public function __construct(private Curl $curl) {}

    public function execute(Observer $observer): void
    {
        $invoice = $observer->getEvent()->getInvoice();
        $order   = $invoice->getOrder();

        // Skip if we've already planted for this invoice
        if ($invoice->getData('oci_planted_at')) {
            return;
        }

        $this->curl->addHeader('Content-Type', 'application/json');
        $this->curl->addHeader('x-api-key', getenv('ONECLICKIMPACT_KEY'));
        $this->curl->post(
            'https://api.1clickimpact.com/v1/plant_tree',
            json_encode([
                'amount'         => 1,
                'customer_email' => $order->getCustomerEmail(),
                'customer_name'  => trim($order->getCustomerFirstname() . ' ' . $order->getCustomerLastname()),
                'notify'         => true,
                'metadata'       => [
                    'order_id'   => $order->getIncrementId(),
                    'invoice_id' => $invoice->getIncrementId(),
                    'source'     => 'magento',
                ],
            ])
        );

        // Response: { "user_id": "...", "tree_planted": 1, "time_utc": "2026-..." }
        $invoice->setData('oci_planted_at', gmdate('c'))->save();
    }
}

3. Read impact back into Magento

Show your customers a live counter on the storefront, in transactional emails, or on the order success page. GET /v1/impact returns combined totals plus a breakdown of direct (user_impact) vs customer-attributed (customer_impact) actions.

curl --location 'https://api.1clickimpact.com/v1/impact' \
  --header 'x-api-key: YOUR_API_KEY'

# Example response shape:
# {
#   "user_id":         "u_abc123",
#   "tree_planted":    12847,
#   "waste_removed":   320,     // lbs of ocean plastic
#   "carbon_captured": 4583,    // lbs of CO₂
#   "money_donated":   25000,   // cents
#   "user_impact":     { "tree_planted": 2000, "waste_removed": 0, ... },
#   "customer_impact": { "tree_planted": 10847, "waste_removed": 320, ... }
# }

Test against the sandbox first: https://sandbox.1clickimpact.com mirrors production but doesn't plant real trees. Swap the base URL when you go live.

Is there an off-the-shelf Magento extension?

The fastest path today is the small custom module shown above plus our REST API — it's about an hour of work for a Magento developer and gives you total control of the trigger. If you'd like us to build it with your team, book a demo and we'll scope it on the call.

When should I fire the API call?

For most stores, sales_order_invoice_pay is right — payment is captured, you're committed to fulfillment. For subscription stores, fire on each successful renewal capture. For B2B with net terms, fire on invoice payment, not order placement.

How do you avoid double-planting on retries?

Hook a once-per-invoice event like sales_order_invoice_pay and set a flag on the invoice (e.g. oci_planted_at) the moment the API call succeeds. The observer above checks that flag before re-firing. Tag every call with metadata.order_id so you can reconcile in the dashboard. If you ever need to reverse an action, /v1/cancel_impact is idempotent — safe to retry.

Is $0.40 per tree real, or is there a catch?

It's the real price. No monthly platform fee, no per-seat charge, no API rate tax. You pay for trees (and other actions: carbon capture from $0.40, ocean plastic from $0.60). The reason it's lower than peers is operational efficiency on our side, not project quality — we work with vetted reforestation partners and surface every planting batch with GPS coordinates.

What about Shopify, WordPress, or other platforms?

Same API, different surface. Shopify merchants install the 1ClickImpact app. WooCommerce stores hook woocommerce_order_status_completed or use Zapier. Custom stacks call the REST API directly. One dashboard, one bill, one impact total across every channel.