How to Integrate a Payment Gateway on Your Website
Adding a payment gateway doesn't have to involve developers, webhooks, or weeks of setup. Here's the simplest way to start accepting payments online and what to use when your pricing gets more complex.
Engineering
Most people make integrating a payment gateway harder than it needs to be.
I’ve talked to a lot of founders who spent days setting up Stripe, wiring up webhooks, building a checkout flow, and debugging edge cases before they sold a single thing. And honestly, for most of them, none of that was necessary. They just didn’t know there was a faster way.
At its core, a payment gateway is simple. You need something that takes the customer’s card details, processes the payment securely, and sends the money to you. That’s it. Everything else, the custom checkout design, the webhook handlers, the database layer, that’s all stuff you build when you actually need it. Not on day one.
We’ve helped a few hundred founders set up pricing through ParityDeals, and the payment gateway question comes up constantly. After trying a lot of different tools with founders, Kelviq is the one we keep coming back to. Its the easiest way to get a payment gateway up and running, and it scales well once your pricing gets more complex.
Here’s how to get started.
Step 1: Create your Kelviq account
Go to kelviq.com and sign up. Name, email, password. Done.
After that you’ll fill out your business profile and add your payout details so Kelviq knows where to send your money. Takes about five minutes total.
Step 2: Create a product
From your dashboard, go to Products and hit Create New Product.
Add your product name, description, and price. Pick a pricing type: one-time, subscription, or pay-what-you-want. Upload an image if you have one. Publish it.
Your product is live. That fast.
Step 3: Start selling
This is where it gets flexible depending on how you want to sell.
Checkout link. The simplest option. Open your product, click Get Checkout Link, copy the URL, and paste it anywhere: your website, an email, a social media bio, a landing page. Anyone who clicks it gets a clean hosted checkout page. Nothing else needed on your end.
Embedded buy button. If you want the checkout directly on your site, grab the embed snippet from your product settings and paste it into your HTML. Literally just copy paste.
Attach a customer. If you already know who is buying, for example inside a SaaS app where the user is already logged in, you can pass customer details directly to the checkout. This links the purchase to a specific customer record in your dashboard, which makes subscription management, overrides, and lifecycle stuff much cleaner down the line.
Dynamic checkout. For more advanced setups, you can create checkout sessions programmatically via the API. This lets you pass in custom pricing, pre-fill customer data, apply discounts dynamically, or build fully custom checkout flows while Kelviq still handles the payment processing and tax on the backend.
Most people start with the checkout link and move to the more advanced options as their product grows. You don’t have to figure all of this out on day one.
Do you need to write code?
No. Not to get started anyway.
The checkout link and embedded button require zero code. The customer attachment and dynamic checkout options do involve the API, but there are detailed docs and the Kelviq team will help you set it up if you get stuck.
What else your payment gateway should handle
Tax is handled for you. Kelviq acts as the Merchant of Record, which means it takes on the legal responsibility for collecting and remitting VAT, GST, and sales tax depending on where your customer is. You don’t have to register for foreign tax IDs or figure out local rules. This one thing alone saves founders a lot of headaches.
Sell globally without doing anything extra. 135+ currencies, built-in fraud protection, VPN detection. It just works.
Localized pricing is built in. If you want to charge less in countries where people earn less, you can set that up directly in Kelviq. No extra tools, no code. This is something we care deeply about at ParityDeals, and its great to see a payment gateway that treats it as a core feature rather than an afterthought.
Usage-based billing, credits, entitlements. Once you’re past simple one-time payments, Kelviq handles the more complex stuff too. Usage metering, feature access control, credit systems, plan overrides, grandfathering. All manageable from the dashboard without touching your code.
Start accepting payments today
You don’t need a developer or a complicated setup to integrate a payment gateway on your website. Create a Kelviq account, add your product, share the checkout link. Most people are accepting payments within the same day.
If your needs grow beyond simple checkout, Kelviq grows with you — subscriptions, usage billing, entitlements, global tax. All from the same platform.
