Most OpenCart payment problems are not “which extension do I buy.” They show up after the extension is installed. The order sits in “Pending” when the bank already took the money. 3-D Secure throws the customer back to the cart on the second step. The gateway your acquirer gave you has no OpenCart module at all, only an API and a PDF. We handle that part: the install, the configuration, and the live test that proves a card actually charges and the order lands in the right status.
We work on OpenCart 3.x and 4.x. We’ve connected the common ones (PayPal, Stripe, Authorize.Net) and the regional acquirers that ship an API instead of a plugin. If your gateway has a maintained extension, we configure and test it. If it doesn’t, we build the module against their API.
Services we combine
Who it's for
This fits a store owner who installed the extension and the orders still show “Pending.” It fits a merchant whose acquirer handed them API credentials and nothing else. It fits an agency that wants the payment piece off their plate before a launch. If you run OpenCart and the gateway is the last thing standing between you and taking money, this is the job. For the broader build (themes, modules, speed) see our OpenCart support work; this bundle is the payment slice of it.
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Stuck merchants
Extension installed, orders still stuck on "Pending."
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API-only acquirers
Your bank gave you credentials and a PDF, no plugin.
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Pre-launch agencies
Want payments tested and signed off before go-live.
How it runs
We start on your staging copy or a maintenance window, never live checkout during business hours. We confirm which gateway, which acquirer, and what currencies you sell in. Then we install or build the module, switch on 3-D Secure, and wire the webhook so a paid order doesn’t sit in limbo. We run a sandbox transaction, then one real card, and watch the order move to the right status. You get the keys-to-live steps in writing.
Scope & access
We confirm gateway, acquirer, OpenCart version, and currencies, and get admin access.
Day 1Install or build
Extension configured, or a custom module written against the gateway API.
Day 1-2Secure & map
3-D Secure enabled, webhook wired so paid, failed, and refunded hit the right order status.
Day 2Test & hand over
Sandbox run, one live card test refunded, handover note delivered.
Day 2-3Price, and what happens after
The bundle starts at $290 for a single gateway with a maintained extension. A custom module built against an API-only gateway runs higher, and we quote it once we’ve seen the acquirer’s docs. No subscription. You pay for the integration and you own it. If you later want us on a support retainer for the whole store, that’s a separate conversation.
Tooling we lean on
Where this fits
This is the payment slice of our OpenCart support work, packaged at a fixed price so you know the cost before we start. If your store also needs a version move or a cleanup, look at our OpenCart modernization bundle, which folds payments into a wider upgrade. And because checkout is where fraud and card data live, it’s worth pairing a new gateway with an OpenCart security review so you’re not taking cards on an unpatched store.
Not sure which processor fits your market? We compare OpenCart payment gateways (Stripe, PayPal, and LiqPay) first.
Gateway installed but orders still stuck on Pending?
Send the context — your stack, the scope, any complications. We come back with a confirmation or a couple of clarifying questions.