PayNexus Payment Gateway

PayNexus Payment Gateway lets you accept M-Pesa mobile money payments on your WordPress website. Money flows directly from the customer to your own M-Pesa payment account — PayNexus never holds or delays your funds.

Features:

• M-Pesa STK Push — Customers receive a payment prompt on their phone
• WooCommerce integration — Full checkout gateway for WooCommerce stores
• Shortcode support — Embed payment forms on any page with [paynexus_payment_form]
• Real-time polling — Automatic status updates without page refresh
• Webhook support — Receive instant payment notifications via REST API
• Admin dashboard — View and filter all payments from WordPress admin
• Secure — HMAC-SHA256 webhook signature verification with replay protection
• Local records — Every payment is stored locally for your records

How It Works:

1. Customer enters their phone number and amount
2. PayNexus sends an M-Pesa STK Push to the customer’s phone
3. Customer enters their M-Pesa PIN to confirm payment
4. Payment status is updated automatically via webhook
5. WooCommerce orders are marked as paid automatically

1. Download the plugin ZIP file
2. Go to Plugins → Add New → Upload Plugin in WordPress admin
3. Upload the ZIP file and click Install Now
4. Activate the plugin
5. Go to PayNexus → Settings to enter your API keys
6. For WooCommerce: enable the gateway at WooCommerce → Settings → Payments → M-Pesa (PayNexus)

Getting API Keys:

1. Sign up at paynexus.co.ke
2. Go to Merchant Dashboard → API Keys
3. Copy your Secret Key (sk_…) and optionally the Public Key (pk_…)

1.0.2

• Updated plugin to meet WordPress plugin standards

1.0.1

• Fixed security vulnerabilities

1.0.0

• Initial release
• M-Pesa STK Push payment initiation
• WooCommerce payment gateway
• Payment form shortcode
• Payment status shortcode
• Admin settings page
• Admin payments list
• Webhook handler with HMAC verification
• Real-time JavaScript status polling