WorldPay Payments WordPress Plugin

About Worldpay

Worldpay is one of the world's largest payment processors, handling card payments for merchants globally.

What Worldpay supports

Cards via the Worldpay Business Gateway hosted payment pages.

• Payment methods: Cards, wallets, 300+ methods
• Where it works: Global
• Billing: one-off payments
• Price: free for every PremiumPress member

Setting up Worldpay in PremiumPress

Activate the free plugin, then open your theme’s payment settings and add your Worldpay credentials:

• Mode — Test sends testMode=100 to the sandbox host.
• Installation ID — Your Worldpay Installation ID (instId).
• MD5 secret — The "MD5 secret for transactions" from your installation. Set SignatureFields to instId:amount:currency:cartId in the Worldpay admin.
• Payment Response password — Set the Payment Response URL

One-time payments. Worldpay FuturePay (agreements) supports recurring but is not enabled in this flow. Amounts are sent with 2 decimal places. Confirmation arrives via the Payment Response callback. The plugin requires PremiumPress 12.

Worldpay plugin FAQ

What do I need to set up Worldpay in WordPress?

You'll need a Worldpay account and its Mode, Installation ID, MD5 secret and Payment Response password, which you enter in your PremiumPress theme's payment settings. The plugin itself is free for members.

Does Worldpay support recurring subscriptions?

Worldpay handles one-off payments in PremiumPress. If you need recurring billing, choose a gateway shown under the Subscriptions filter on the plugins page.

How does the Worldpay checkout work?

A signed auto-POST to the hosted purchase page, with the Payment Response callback verified and confirmed. One-time payments, no SDK.