Invizo

<p>Invizo Cart helps you sell digital files, software products, e-books, design assets, templates, and licensed downloads from your WordPress site.</p>
<p>You can use it to create products, collect payments, generate license keys, deliver download links, manage orders, and give customers a frontend account area for their purchases.</p>
<p>The plugin is built for site owners who want a focused digital commerce workflow without turning every page into a large shop catalog. It includes product management, checkout shortcodes, customer order records, license records, tax settings, coupons, and a React-powered admin interface.</p>
<h4>Highlights</h4>
<ul>
<li>Digital product management with pricing, sale pricing, product media, file lists, and product descriptions.</li>
<li>Software license generation for paid orders.</li>
<li>Frontend shortcodes for product grids, checkout, order success pages, account dashboards, and single product displays.</li>
<li>Stripe, PayPal, and Paddle payment gateway integrations.</li>
<li>Tax rate management for country and state-level tax rules.</li>
<li>Coupon and discount management.</li>
<li>Customer and order management inside WordPress.</li>
<li>Download logging for delivered files.</li>
<li>React-powered admin screens for products, orders, customers, licenses, taxes, discounts, exports, and settings.</li>
<li>Custom database tables for digital product, order, license, tax, download, and coupon records.</li>
</ul>
<h4>Shortcodes</h4>
<p>Use these shortcodes on normal WordPress pages:</p>
<ul>
<li><code>[invizocart_products]</code> – show a frontend product grid.</li>
<li><code>[invizocart_cart]</code> – show the cart page with quantity controls and checkout link.</li>
<li><code>[invizocart_single_product]</code> – show a single digital product layout.</li>
<li><code>[invizocart_checkout]</code> – show the checkout page.</li>
<li><code>[invizocart_checkout_success]</code> – show the post-payment success page.</li>
<li><code>[invizocart_account_dashboard]</code> – show the customer account and downloads area.</li>
</ul>
<p>You can also link directly to checkout with a product query string, for example <code>/checkout/?add=123</code>.</p>
<h4>Who is this for?</h4>
<p>Invizo Cart is useful for:</p>
<ul>
<li>Developers selling licensed plugins, themes, templates, or software.</li>
<li>Designers selling UI kits, graphics, presets, or downloadable assets.</li>
<li>Creators selling e-books, guides, courses, or resource files.</li>
<li>Agencies that need a lightweight digital product checkout for client assets.</li>
<li>Site owners who want a focused digital store without a full physical-product catalog.</li>
</ul>
<h3>External services</h3>
<p>This plugin connects to external payment services outside your site.</p>
<ul>
<li><strong>Stripe API</strong> is used to create payment intents, confirm payment status, and process webhook events.</li>
<li><strong>PayPal checkout services</strong> may be used to redirect customers to PayPal and confirm checkout status.</li>
<li><strong>Paddle checkout services</strong> may be used to redirect customers to Paddle and confirm checkout status.</li>
</ul>
<h4>What data is sent to Stripe?</h4>
<p>When Stripe checkout is used, the plugin may send the order ID, customer email address, purchase amount, product metadata, payment intent IDs, and related payment metadata needed to create and confirm payment.</p>
<p>Payment card details are handled by Stripe.</p>
<ul>
<li>Stripe Services Agreement: https://stripe.com/ssa</li>
<li>Stripe Privacy Policy: https://stripe.com/privacy</li>
</ul>
<h4>What data is sent to PayPal?</h4>
<p>When PayPal checkout is used, the plugin may send the order reference, customer/payment context, and payment amount needed to initialize and confirm checkout.</p>
<ul>
<li>PayPal Legal Agreements: https://www.paypal.com/us/legalhub/paypal/home</li>
<li>PayPal Privacy Center: https://www.paypal.com/us/privacy-center/home</li>
</ul>
<h4>What data is sent to Paddle?</h4>
<p>When Paddle checkout is used, the plugin may send the order reference, customer/payment context, and payment amount needed to initialize and confirm checkout.</p>
<ul>
<li>Paddle Terms: https://www.paddle.com/legal/terms</li>
<li>Paddle Privacy Policy: https://www.paddle.com/legal/privacy</li>
</ul>
<h3>Build and source files</h3>
<p>The plugin includes generated browser assets for performance and the human-readable source files needed to review and rebuild them.</p>
<h4>Admin app assets</h4>
<ul>
<li>Generated files: <code>assets/admin-build/index.html</code> and <code>assets/admin-build/js/app.js</code>.</li>
<li>Source directory: <code>admin-ui/src/</code>.</li>
<li>Important source files: <code>admin-ui/src/main.jsx</code>, <code>admin-ui/src/App.jsx</code>, <code>admin-ui/src/*.jsx</code>, <code>admin-ui/src/App.css</code>, and <code>admin-ui/src/index.css</code>.</li>
<li>Build files included for review: <code>admin-ui/package.json</code>, <code>admin-ui/package-lock.json</code>, <code>admin-ui/vite.config.js</code>, and <code>admin-ui/index.html</code>.</li>
<li>Rebuild command: <code>cd admin-ui && npm install && npm run build</code>.</li>
</ul>
<h4>Frontend templates</h4>
<p>Frontend shortcode and template output is generated from PHP source files, including:</p>
<ul>
<li><code>src/Shortcodes.php</code></li>
<li><code>src/PublicFacing/Template_Manager.php</code></li>
<li><code>public/templates/single-digital-product.php</code></li>
</ul>
<h4>PHP dependencies</h4>
<p>Stripe’s PHP SDK and PayPal HTTP classes are installed with Composer and prefixed with Mozart into <code>InvizoCartVendor\</code> under <code>vendor_prefixed/</code>.</p>
<p>Stripe’s own SDK contains a cURL-based HTTP client. Those cURL calls are part of the third-party Stripe library, not plugin-specific HTTP code. Plugin-specific HTTP requests should use WordPress APIs.</p>
<p>The root <code>vendor/</code> and <code>node_modules/</code> folders are not included in the release package. The reviewable React source is included, but <code>admin-ui/node_modules/</code> is not.</p>


Invizo Cart

Sell digital downloads, software licenses, and digital products with checkout pages, customer account pages, download delivery, and payment gateways.

codulon

<p>Codulon Serial Manager Lite lets store owners create and manage manual license keys directly inside WordPress.</p>
<p>This free plugin focuses on manual key management, customer lookup by shortcode, and a basic REST validation endpoint.</p>
<h4>Lite includes</h4>
<ul>
<li>Manual license-key creation.</li>
<li>Automatic serial generation from the manual form.</li>
<li>License status management: active, suspended, and expired.</li>
<li>Searchable admin table.</li>
<li>Copy-to-clipboard serial buttons.</li>
<li>Basic customer shortcode: <code>[codulon_serial_keys_lite]</code>.</li>
<li>Working validation API for locally created serials.</li>
<li>First-activation binding to <code>hardwareId</code>.</li>
<li>Hardware ID mismatch protection for locally created serials.</li>
</ul>
<h4>Pro adds</h4>
<ul>
<li>WooCommerce order automation.</li>
<li>Automatic serial generation when orders are paid.</li>
<li>Product-level “Issue serial/license key” settings.</li>
<li>Product and variation license settings.</li>
<li>Perpetual license keys.</li>
<li>Time-limited license keys.</li>
<li>One-time evaluation licenses.</li>
<li>Paid upgrade targets for evaluation products.</li>
<li>Duplicate evaluation blocking by customer, website, or device.</li>
<li>Advanced manual serial entry with product and variation defaults.</li>
<li>Manual expiry/subscription controls.</li>
<li>Advanced status, sorting, filtering, and operational views.</li>
<li>Serial suspension, unsuspension, expiry, and revoke workflows.</li>
<li>Serial history logs.</li>
<li>Resend serial delivery emails.</li>
<li>CSV import.</li>
<li>CSV export.</li>
<li>Customer account delivery.</li>
<li>Customer serial status, expiry, activation, download, and evaluation-expiry details.</li>
<li>License PDF downloads.</li>
<li>Purchased file download links in account and email views.</li>
<li>Branded serial emails.</li>
<li>Order confirmation template.</li>
<li>Invoice / order-details payment template.</li>
<li>Renewal payment request template.</li>
<li>Trial-ending reminder template.</li>
<li>Expiry reminder emails.</li>
<li>Expired/revoked license notice emails.</li>
<li>Packing list and order item email sections.</li>
<li>Email template editor.</li>
<li>Test/sample email sending.</li>
<li>Restore default email templates.</li>
<li>Copy header/footer regions between templates.</li>
<li>Email-safe header logo/image sizing.</li>
<li>Email tokens for serials, renewal choices, order items, totals, VAT notes, customer data, store data, and downloads.</li>
<li>VAT note and tax/totals integration.</li>
<li>Store contact, footer link, and address tokens.</li>
<li>Email and shop theme settings.</li>
<li>Preset themes and color controls.</li>
<li>WooCommerce storefront styling for shop, cart, checkout, order, payment, and account pages.</li>
<li>Product images in email rows.</li>
<li>Subscriptions, renewals, and evaluation upgrades.</li>
<li>Renewal order generation.</li>
<li>Multi-license renewal selection page.</li>
<li>Early renewal extension handling.</li>
<li>Unpaid renewal handling.</li>
<li>Scheduled renewal and expiry sweeps.</li>
<li>Activation API checks.</li>
<li>Website/plugin activation binding.</li>
<li>Desktop app hardware ID hash support.</li>
<li>Activation mismatch protection.</li>
<li>Expired, suspended, revoked, and duplicate API responses.</li>
<li>API rate limiting.</li>
<li>API settings and integration guidance.</li>
<li>PDF, CSV, import, export, and operational tools.</li>
<li>Automatic revoke on cancelled, failed, or refunded WooCommerce orders.</li>
<li>Revoked and unpaid-revoked customer email handling.</li>
<li>Virtual license order processing support.</li>
<li>Built-in manual and documentation page.</li>
<li>Update delivery tools for the separate full version.</li>
</ul>
<p>Buy the full version:<br />
https://codulon.com/shop</p>
<h4>API reference</h4>
<p>This plugin includes a working serial validation API for locally created serials:</p>
<pre><code>POST https://yourdomain.com/wp-json/wc-custom/v1/validate-serial
</code></pre>
<p>Required fields:</p>
<ul>
<li><code>serial</code> – the license key shown to the customer.</li>
<li><code>hardwareId</code> – one stable activation identity.</li>
</ul>
<p>For websites, WordPress plugins, or PHP apps, use the canonical site URL as <code>hardwareId</code>.</p>
<p>For desktop software, use a stable hashed device ID as <code>hardwareId</code>. Do not send raw hardware serial numbers.</p>
<p>Example JSON request:</p>
<pre><code>{
  "serial": "ABCD-EFGH-IJKL-MNOP",
  "hardwareId": "https://example-client-site.com"
}
</code></pre>
<p>Example success response:</p>
<pre><code>{
  "valid": "True",
  "message": "Serial validated and hardware ID activated.",
  "email": "customer@example.com",
  "last_name": "Customer"
}
</code></pre>
<p>Common failed responses use <code>"valid": "False"</code> with a <code>message</code>, for example serial not found, hardware ID mismatch, expired, suspended, or rate limited.</p>
<p>Important: this plugin validates serials created inside Codulon Serial Manager Lite. The separate full version uses the same endpoint path but validates WooCommerce serials, subscriptions, renewals, revoked access, customer order data, and advanced license rules.</p>


Codulon Serial Manager Lite


Try the PRO plugin. In one word: Fantastic!


Great UI.

A lightweight tool for manual license-key management, including a working validation API.

Invizo Cart vs Codulon Serial Manager Lite