Add Real AI to Your WordPress Site
OpenAI API integration for WordPress that adds real AI features to your site, from chatbots trained on your content and in-editor content generation to semantic search and WooCommerce product copy. Built as clean custom code with cost controls and error handling, not a plugin bolted on.
Some of our direct clients
Why Businesses Build OpenAI Features With Us
A UK team that builds AI into WordPress as clean custom code, with cost controls, streaming and error handling, so features hold up once real visitors start using them.
AI Chatbots That Know Your Business
Conversational chatbots powered by GPT-4o that answer questions, guide visitors, and capture leads, trained on your content and branded to your site.
Content Generation in the Editor
Generate drafts, rewrite for tone, expand bullet points, or summarise long content within the WordPress editor using OpenAI without leaving your workflow.
Semantic Search for WordPress
Replace keyword search with meaning-based search using OpenAI embeddings. Visitors find what they are looking for even when they do not know the exact phrase.
WooCommerce AI Features
Generate product descriptions, SEO metadata, and content variations at scale. AI that works within WooCommerce data to produce accurate, on-brand output.
Cost Controls and Rate Limiting
We build spend limits, caching, and usage monitoring into every integration so your OpenAI bill stays predictable and within budget.
Production-Ready from Day One
Proper prompt engineering, streaming responses, error handling, logging, and token management. Not a plugin hack, a proper integration.
The Stack We Build AI On
The OpenAI API wired natively into WordPress and WooCommerce, with embeddings, vector search and RAG where a feature needs them, rather than a plugin bolted on top.
Laravel & Bespoke Platforms
For systems and platforms that require bespoke processes, data handling complex integrations or internal business platforms with security at the forefront of the build.
WordPress & WooCommerce
For fast, reliable and easy to manage brochure based websites built following best practice with a bespoke theme powered by ACF Pro and supporting custom built plugins.
Shopify & Shopify Plus
For eCommerce and retail brands looking to grow revenue significantly online. Built using a bespoke theme specific to your brand and with a full seamless migration from legacy platforms.
Recently Completed Projects
QualityHive
A Laravel platform that web agencies use to capture, assign and close website bugs, taken from wireframe to launch, then handed over as clean, documented code.
SaaS platform · Laravel · API integrations
Clintons Cards
A full migration from Magento 2 to Shopify Plus, with order, customer, product, stock and finance integrations kept live through the switch.
Ecommerce · Shopify Plus · Integrations
The Sauce Foundry
A brand, a WooCommerce store and product photography for an artisan hot sauce startup, launched to a 3.8% conversion rate from day one.
Ecommerce · Branding · WooCommerce
A Website QA Platform Built To Scale
QualityHive came to us with an idea and a waiting list. We built them a Laravel platform that web design and development agencies now use to capture bugs straight from a client's website, assign them to developers and close them off, and handed it over as clean, documented code.
The Brief
Agencies were collecting website feedback the hard way: long email threads, shared spreadsheets and screenshots pasted into documents. Nothing was assignable, nothing was searchable, and the same bug was often reported three times by three different people.
QualityHive needed a platform an agency could roll out to a client in minutes, with a browser extension that captures a bug straight from the page, complete with a screenshot, the exact URL and the browser and screen it happened on, and an API their clients' project tools could talk to.
What We Built
One platform, three jobs: capture a bug on the page, triage it with the team, prove it fixed to the client.
Point-And-Click Capture
A browser extension pins a bug straight onto the client's site, grabbing a screenshot, the exact URL and the browser, OS and screen size, so nobody has to describe where it happened.
Assignment And Triage
Every bug routes to a developer with a status, a due date and a full comment thread. Duplicates are caught as they are raised, on a board the whole team shares.
Client-Ready Reporting
Open bugs, resolution rates and project progress export as clean, branded reports, which is what QualityHive's own agency customers renew on.
Roles And Permissions
Agency, developer and client each see their own view of a project, with per-project access managed by the account owner.
Billing And Trials
Per-seat subscriptions, trial expiry and proration wired through Stripe, so the team can price without touching code.
A Documented API
A REST API with webhooks and written docs, so their customers' project tools can pull bug data without our involvement.
How We Ran It
Four stages, weekly demos, and direct access to the developer writing the code. No account managers in between.
Two workshops with real agency feedback in hand, then a written spec and a fixed quote.
Every screen agreed in grayscale before a line of Laravel, so changes cost minutes rather than sprints.
Fortnightly releases to a staging site the team could hand to pilot customers and comment on directly.
Repository, environment notes and API docs transferred, with a retained day a month for support.
The Result
QualityHive launched to their pilot agencies in week 14 and replaced the email-and-spreadsheet routine entirely. Feedback that used to take an evening to chase down is now captured in a click from the page it happened on, and the API means larger customers can pull bug data into their own reporting without asking anyone.
We still support the platform on a retained day a month, and the code sits in their repository, not ours.
We built QualityHive because website QA was still being run through email threads and spreadsheets. Now an agency captures a bug in a click straight from the page, assigns it and closes it off, all in one place. It has become the tool teams open first thing in the morning, which is exactly what we set out to build.
Head of Product, QualityHive
From Magento To Shopify Plus
We had supported Clintons Cards on Magento 2 for years. When the platform started to hold the business back, we migrated the whole storefront to Shopify Plus, kept every integration running through the switch, and lifted both conversion and revenue in the process.
The Brief
Clintons Cards had been running on Magento 2 for years, a platform we knew inside out from supporting it day to day. It had become slow to change, expensive to host and awkward to extend, and every peak trading period turned into a stress test the business would rather not sit.
They wanted to move to Shopify Plus without losing a single order, customer record or product, and without breaking the integrations their operation depends on, including the stock and finance link into their internal financing platform.
What We Built
A clean Shopify Plus storefront, and the integration layer that kept the business running through the switch and after it.
Magento to Shopify Plus Migration
Every product, customer and historic order moved across to Shopify Plus, mapped and reconciled, so nothing was lost and customers noticed only a faster, cleaner store.
Order and Customer Sync
Orders and customer records flow between Shopify and the back office in real time, so the operation runs on one source of truth rather than nightly exports.
Product and Catalogue Integration
Product data, variants and pricing stay in step across systems, so the catalogue is managed once and is right everywhere it appears.
Stock and Finance Integration
A live link into their internal financing platform keeps stock levels and financials aligned, so what the store sells and what the business reports never drift apart.
A Resilient Peak
Shopify Plus takes the hosting and scaling worry off the table, so Christmas and Valentine's peaks are handled by the platform rather than a late night on call.
A Clean Handover
The store, the theme and the integration layer were documented and handed over, with us on hand through the first peak and beyond.
How We Ran It
A migration with no big-bang risk: mapped, staged, tested against real data, then switched over in a controlled cutover.
We mapped every Magento entity, integration and custom flow, using what we already knew from supporting the platform.
The Shopify Plus store and the integration layer were built and wired to a staging environment running real, anonymised data.
Products, customers and order history were moved and reconciled, with counts checked on both sides before anyone signed off.
A controlled switch with the integrations live from minute one, and us watching the first orders land.
The Result
Clintons Cards moved off Magento onto Shopify Plus with no lost data and no gap in trading. Conversion rate rose by over three percent and revenue was up fourteen percent, on a store that is faster to shop and far easier for the team to run.
The integrations that keep stock, finance, orders and customers in step came through the migration intact, and we still support the platform as the business grows.
Migrating a retailer the size of Clintons Cards is where these projects usually come unstuck. The volume of orders, customers and SKUs leaves nowhere to hide, but we moved the lot to Shopify Plus with the integrations live throughout, not a record out of place, and the store came out faster and trading better than it went in.
Development Director, Zestcode
A Hot Sauce Brand Launched To Sell
The Sauce Foundry came to us as a startup with a great product and not much else. We built the brand, designed and built the store, sorted the product photography, and launched them to a 3.8% conversion rate from day one.
The Brief
The Sauce Foundry is an artisan hot sauce maker that arrived as a startup: a strong product, a founder with a vision, and no brand or store to sell it through. They needed the lot building from scratch, and they needed it to convert from launch, not eventually.
That meant more than a website. It meant an identity that looked established on day one, product photography good enough to sell a flavour through a screen, and a store built around the buy rather than bolted on after.
What We Built
A brand, a store and the photography to sell it, delivered together so nothing looked stitched from separate suppliers.
A Brand From Scratch
We shaped The Sauce Foundry's identity from the name outward, the logo, palette and voice, so a new maker turned up to market looking like it had been there for years.
A Store Built To Convert
A clean, fast storefront designed around the product and the buy, which is why it launched at a 3.8% conversion rate rather than slowly growing into one.
Product Photography, Sorted
Great sauce needs great photography, so we put them in touch with a photographer we trust and art directed the shots the store was built around.
Ready For Launch Day
Payments, shipping and stock were set up and tested so the very first order could land the moment the doors opened, not a week later.
Fast And Cached
Hosting tuned with server-level caching, so a small team is not paying enterprise bills and the store stays quick even when a new sauce takes off.
Room To Grow
Built on WooCommerce, so The Sauce Foundry owns the store outright and can add products, wholesale and subscriptions as the range expands.
How We Ran It
Brand first, then a store built around it, then a launch that was ready to sell from the first click.
We got to know the range, the maker and the customer, then agreed the brand direction and the shape of the store.
Identity, packaging cues and tone of voice, so the look was locked before a single page was designed.
The WooCommerce store designed and built around the products, with the photography we art directed dropped straight in.
Payments, shipping and analytics tested, then a clean launch, live and selling from day one.
The Result
The Sauce Foundry launched to a 3.8% conversion rate from day one, a figure plenty of established stores work years to reach. A brand new maker arrived at market looking the part, with a store that sold from the first visit.
We handled the brand, the build and the product photography together, and left them with a WooCommerce store they own outright and can grow into as the range and the business expand.
We came to Zestcode with a product and little else, and they handed us back a brand and a website we are genuinely pleased with. It looked the part from launch and, more to the point, it sold from launch.
The Sauce Foundry
Here's What Our
Clients Say
Consistently rated 5* on Google by our full build clients and retainer clients.
OpenAI WordPress Integration FAQs
Custom OpenAI API Integration for WordPress and WooCommerce
Adding AI to a WordPress site is easy to demo and hard to run in production. The questions that matter are what the AI can genuinely do with your content, how you stop it burning money, and whether it will still behave once real visitors start using it. Here is how we build integrations that hold up on all three.
What you can actually build with the OpenAI API
The OpenAI API is not one feature, it is a toolkit, and the useful part is choosing the right piece for the problem in front of you. On WordPress the common builds are a chatbot that answers questions from your own content, content generation inside the editor, meaning-based search using embeddings, and automated product copy for WooCommerce catalogues.
Each of these uses the API differently. A chatbot needs retrieval and streaming, semantic search needs embeddings and a vector store, and bulk product copy needs batching and cost control more than anything clever. We start by matching the feature to the outcome you want rather than fitting your site around a demo.
If you are mainly after the conversational side, our dedicated AI chatbot development work goes deeper on that specific build.
Training the AI on your own content
An OpenAI model out of the box knows a lot about the world and nothing about your business. The value comes from grounding it in your content, so answers reflect your services, pricing, policies and tone rather than a confident guess.
We do this with retrieval, not fine-tuning in most cases. Your pages, posts, documents and product data are turned into embeddings and stored, and when a visitor asks something the relevant passages are pulled in and given to the model as context. That keeps answers accurate, keeps them current when you update a page, and lets the AI say it does not know instead of inventing something.
The result is a chatbot or search that stays inside the boundaries of what you have actually published, which is exactly what you want when it is speaking to customers on your behalf.
Content generation without leaving the editor
Writing tools are far more useful when they live where the writing happens. We build generation into the WordPress editor itself, so you can draft a section, rewrite a paragraph for tone, expand bullet points or summarise a long article without copying text out to another tab and back.
Behind that simple button is careful prompt engineering. The model is given your brand voice, the surrounding content and clear instructions, so output arrives close to usable rather than generic filler that needs heavy editing.
For WooCommerce stores this scales into real time saved. Product descriptions, SEO metadata and short and long variations can be generated against your actual product data, so the copy is accurate to the item rather than plausible-sounding nonsense. It pairs well with wider WooCommerce development work if the catalogue itself needs attention.
Not sure which AI feature is worth building first?
Send us how your site is used and where visitors or your team get stuck today. We will tell you honestly which OpenAI feature earns its keep and what it would take to build.
Semantic search that understands intent
Default WordPress search matches keywords. If a visitor searches for a phrase you did not use, they get nothing, even when the answer is sitting on your site. That is a common reason people bounce and assume the information is not there.
Semantic search fixes this by matching on meaning. We turn your content into embeddings, do the same with each query, and return the closest matches conceptually rather than by exact wording. Someone searching for a benefit finds the page that describes it, even in different words.
We build this to sit alongside or replace your existing search, with sensible caching so repeated queries do not each cost an API call. It works particularly well on content-heavy sites, knowledge bases and larger catalogues where the exact phrasing is hard to predict.
Keeping the OpenAI bill predictable
Usage-based pricing is where AI features quietly go wrong. A feature that costs pennies in testing can cost real money once traffic arrives, and without controls in place you only find out when the invoice lands.
We build cost management in from the start, not as an afterthought. That means caching responses and embeddings so the same work is not paid for twice, rate limiting to stop abuse or runaway loops, sensible model choice so you are not paying for the most expensive model where a cheaper one is fine, and hard spend ceilings.
You also get usage monitoring, so you can see what is being spent and where. The aim is a feature you can budget for with confidence, which is the same principle we bring to business automation projects where predictable running cost matters as much as the build.
Custom build versus an off-the-shelf plugin
There are plenty of AI plugins for WordPress, and for a quick experiment they are fine. Where they fall down is control. You are handing your API key and often your content to a third party, you get their prompts rather than yours, and you have little say over cost, caching, error handling or how the feature behaves when the API is slow or down.
A custom integration is yours. The prompts, the data flow, the fallback behaviour and the spend limits are all things we build and you own, and there is no monthly plugin fee sitting on top of your OpenAI usage.
We build with streaming where it improves the experience, proper error handling so a failed call degrades gracefully instead of showing a broken page, and logging so problems are visible. If you would rather this sat within a broader engagement, it fits naturally with our WordPress development and API integration work.
Partner with Zestcode for Industry Leading Quality and Reliability
Tell what you're looking for and we'll see you how we can help. Quotes are typically provided within 2 working days of the initial call.