Up and Running in 5 Minutes
Follow these steps to install and configure Nexus Tax Exemptions on your Wix store.
Visit the Wix App Market
Open your Wix dashboard and navigate to the App Market. Search for 'Nexus Tax Exemptions' or click the direct link below.
Add the App
Click 'Add to Site' on the Nexus Tax Exemptions app page. Review the permissions requested — Nexus needs access to your store orders and customer data.
Authenticate with Wix
You'll be redirected to our secure authentication portal. Sign in with your Wix account to authorize Nexus. This uses Wix's official OAuth 2.0 flow.
Configure Your Settings
After authentication, you'll land in the Nexus dashboard. Configure your business details, state registrations, and exemption types.
Go Live
Enable Nexus on your checkout and start collecting exemption certificates automatically. Your customers will see a tax exemption option at checkout.
Deep Wix Integration
Nexus integrates deeply with Wix Stores, Members, and the Wix API to deliver a seamless experience.
Seamless Customer Experience
When a customer with an exemption certificate checks out on your Wix store, Nexus automatically displays a tax exemption option. Customers can upload their certificate or select a previously verified one.
- Automatic exemption prompt for qualifying customers
- Support for all major certificate types (Resale, Manufacturing, Nonprofit, etc.)
- Mobile-friendly certificate upload
- Instant validation — customers see immediate approval
// Nexus auto-injects into Wix Stores checkout
// No custom code required for basic setup
// For custom triggers, use our JS SDK:
import { NexusTax } from "@nexustax/wix-sdk";
const nexus = new NexusTax({ siteId: "YOUR_SITE_ID" });
// Check exemption status for a customer
const status = await nexus.checkExemption({
customerId: "wix-member-id",
state: "CA"
});
console.log(status.isExempt); // true / false
console.log(status.certificateId); // cert-abc123Wix-Native Authentication
Nexus uses Wix's official OAuth 2.0 authentication. We never store your Wix credentials — only secure, scoped access tokens that you can revoke at any time.
OAuth 2.0 Standard
Industry-standard authentication via Wix's official identity provider
Scoped Permissions
We only request the specific permissions needed — nothing more
Instant Revocation
Disconnect Nexus from your Wix dashboard at any time to immediately revoke access
Authentication Flow
// OAuth token usage (handled automatically) // Nexus manages token refresh internally GET https://api.nexustax.com/v1/site Authorization: Bearer wix_oauth_token_... X-Wix-Site-Id: your-site-id // Permissions required: // - WIX_STORES.ORDERS.READ // - WIX_MEMBERS.MEMBERS.READ // - WIX_ECOMMERCE.CATALOG.READ
Developer Documentation
Everything you need to integrate, customize, and extend Nexus Tax Exemptions.
Quick Start Guide
Prerequisites
An active Wix Stores subscription and Nexus account (free trial available). No coding required for basic setup.
Environment Variables
After installation, find your API keys in the Nexus dashboard under Settings → API Keys.
NEXUS_API_KEY=nxs_live_xxxxxxxxxxxx NEXUS_SITE_ID=your-wix-site-id NEXUS_WEBHOOK_SECRET=whsec_xxxxxxxx
Test Your Connection
Use our API to verify the integration is working correctly.
curl -X GET https://api.nexustax.com/v1/ping \
-H "Authorization: Bearer nxs_live_xxxx" \
-H "X-Wix-Site-Id: your-site-id"
# Response: {"status": "ok", "site": "your-store.wixsite.com"}