Payment Express PxPay Documentation

Windcave (formerly Payment Express) is a certified Visa and MasterCard solution that facilitates electronic payments from multiple access points for your WooCommerce store.


  1. Download the .zip file for PxPay
  2. Go toWordPress Admin > Plugins > Add New to upload the file you downloaded with Choose File.
  3. Activate the extension.

More information at: Installing and Managing Plugins.

Sign up with Payment Express

  1. Go to the Windcave (formerly Payment Express) website and sign up for an account.
  2. Wait for Sales to contact you with an answer on activation.
  3. Request PxPay credentials if the email you received doesn’t already contain them. Specifically you need:
    • PxPay Access URL
    • PxPay User ID
    • Access Key

Setup and Configuration

  1. Go toWooCommerce > Settings > Payments > Payment Express
  2. Tick checkbox to Enable Payment Express.
  3. Enter Title shown to customers in checkout. Default is Payment Express; can be Credit Card or whatever you wish.
  4. Enter Description shown to explain Title.
  1. Enter a name (e.g., your business) or a URL (e.g., your website/online store) for Merchant Reference.
  2. Enter Px Credentials obtained when you signed up with Payment Express.
  • Px-Pay Access User ID
  • Px-Pay Access Key

3. Save changes.

Test Mode

  1. Log into your Payment Express account.
  2. Request testing credentials.
  3. Enter info at WooCommerce > Checkout > Payment Express.
  4. Save changes.
  5. Use the Windcave Testing Details.

When finished, go back to WooCommerce > Checkout > Payment Express and re-input your live account info from step 6 in Setup and Configuration.

Questions & Support

Have a question before you buy? Please fill out this pre-sales form.

Already purchased and need some assistance? Get in touch with us via our Help Desk.