Adding payments looks like a one afternoon job. Drop in a checkout, take a card, done. Then reality arrives. A renewal card fails and the customer keeps full access. A webhook fires twice and you grant the same credits twice. Someone upgrades halfway through a billing cycle and the proration is wrong. A refund goes out but the access never gets revoked. The button was the easy part. The money landing correctly, every time, in every weird case, is the real work, and that is the gap I close.

What I Build

I wire real payments into your product end to end. That means the checkout your customer sees, the subscription or credit logic behind it, and the webhook handling that keeps your own database honest about who has paid for what. Whether you are selling a one time purchase, a recurring subscription, or usage based credits, the goal is the same. A customer who pays always ends up with exactly what they paid for, and a customer who stops paying loses access cleanly. The unglamorous middle is where I spend the real effort. Webhooks that arrive out of order or twice, handled so they cannot double grant. Failed renewals that downgrade access instead of silently leaking it. Upgrades, downgrades, and refunds that update entitlements correctly. A customer portal so people can manage their own billing instead of emailing you. None of that is visible on the pricing page, and all of it is the difference between revenue you can trust and a slow leak you discover in an audit.

How I Work

I have built this on live products that take real money, so I know where the bodies are buried. I start by asking what you actually sell and to whom, then I recommend the provider that fits your product and your country honestly, rather than reaching for whatever I used last. Then I build the integration so the database is always the source of truth for entitlements, reconciled against the provider through webhooks, because the alternative is trusting a checkout redirect and hoping. You talk to the person doing the work, there is no agency markup, and I tell you up front where the genuine complexity is so the estimate is real. Most payment integrations start around $2,000. You can ballpark your own project before we talk.

Proof

I built and shipped the embedded checkout, webhook handling, and entitlement logic for Tool Index, a live product taking real payments, and a subscription and usage credit billing system for Apatero Studio, my AI platform with real paying customers. These are products in production, charging real people, not a test integration in sandbox mode. Tool Index at Tool Index takes payment inline on the page and stays in sync through webhooks, exactly the architecture I would build for you. You can see more of what I have built on my work page.

Further Reading

I broke down where payments actually go wrong, and how to keep the money landing correctly, in How I Add Payments To A Product Without The Leaks.

Common Questions

What does it cover? Checkout, subscriptions or credits, and the webhook handling that keeps your database in sync with what the provider actually did. Which provider should I use? It depends on what you sell and where. I work with Whop, Stripe, and Lemon Squeezy and will tell you honestly which fits. Why is this harder than a checkout button? The button is the easy part. Webhooks, failed renewals, refunds, and proration are where products quietly leak money or access. How does pricing work? Most payment integrations start around $2,000, scoped against what you are selling. How do we start? We get on a short call and I tell you which provider fits and the cleanest path to taking real money. Ready to take payments without the leaks? Book a call.