Address validation is a priority when an AI-built app starts trading
Vibe coding has gone from a niche idea to one of the most talked-about shifts in software. Founders, side project enthusiasts, and small teams are describing what they want in simple English and getting working apps back from tools like Lovable, Bolt, Replit, and base44. As a business that has always enjoyed exploring new tools ourselves, we find this genuinely exciting. It is changing who gets to build, how quickly an idea can reach a user, and what an early-stage product can look like.
There is a difference between an app that looks fully functioning and one that behaves as if it is. The visual polish from today’s AI builders is impressive, and most generated interfaces feel professional from the first render. The gap tends to show up in the features that are needed in the real world.
In a running business, address data is operational. It is not just a field on the checkout page. It is used to ship a parcel, run an identity check, generate an invoice, calculate VAT, inform the marketing strategy, and complete the customer profile.
Many AI-built apps begin as experiments and turn into something more serious. At that stage, builders need to start thinking about how this functionality holds up at volume. When the address field is generated by an AI builder as a basic free-text input, the data it produces tends to be inconsistent. By the time that data is used downstream, the problems are already in place.
Address handling is usually among the first parts of the product to be tested at scale, because the cost of inaccurate data is felt across several parts of the operation:
Fulfilment: undeliverable parcels lead to reshipment costs, refund risk, and direct customer complaints.
Finance and compliance: VAT, duties, and identity verification can all depend on a confirmed address being on file.
Customer records: inconsistent formatting makes it harder to deduplicate contacts, segment customers, or move data cleanly between systems.
Support load: addresses that have to be corrected by hand or chased over email take up time that a small team often does not have.
These issues are rarely caused by a single bad entry. They are caused by an address field that was never set up to produce reliable data in the first place. The encouraging part is that this can be corrected without rebuilding the app. Address validation is added at the form, and the rest of the product is left as it is.
We have put together documentation for adding address validation to the most popular AI app builders, including:
The prompt has already been written, so it only needs to be copied and pasted into the builder of your choice. You will also need an Ideal Postcodes account, which can be set up for free, to generate an API key. The key is what connects the builder to our address data, and it can be restricted to your own domain before the app is taken live.
Vibe coding is opening up software creation to a much wider group of people, and a lot of interesting businesses are going to come out of this moment. What separates the products that grow from the ones that stall is often the quality of the data they are built on, and addresses are one of the clearest examples of that.