Fintech
Shared expenses that settle themselves
A household budget or a trip splits a bill between several people, and every entry moves what each of them owes. The API recalculates those balances as transactions arrive.
AI integration
Your software already has an API. That is where the AI goes.
We wire OpenAI or Claude into the endpoints your system already exposes, and nothing else moves. Nobody in house holds an API key.
- Keys never leave the server
- Retention off by default
A requestFrom your app
The wrapperHolds the keys
CacheChecked first
Model APIOpenAI / Claude
Your own logicYour rules answer
What this service is
Custom AI API integration connects a hosted model to software that already exists, through the API that software already exposes. A wrapper sits in front of your own logic and calls it, so the model asks and your rules answer. Keys stay on the server, and the integration can be removed without touching the system underneath.
The demo works. The integration is the hard part.
Anyone can call an API once. A live product is where it gets difficult. Keys leak, and a model that times out can take a whole screen down with it. None of that argues for a rewrite.
- 01
Nobody owns the keys
The API key sits in somebody's environment file and the monthly bill goes to whoever set it up. Neither has an owner once that person moves on.
- 02
The bill grows on its own
Every request goes to the largest model, because that is what the demo happened to use. Usage doubles and spend doubles with it. Nobody notices until an invoice says so.
- 03
A rewrite is not the answer
An established app carries a release process and users who expect it to keep working. A rebuild puts both at risk, and a new store review, to add one feature.
What custom AI API integration covers
- 01
LLM API integration
We wire OpenAI and Claude in through the framework your system was already built on. Model choice stays a setting rather than a rewrite, so swapping one for the other later costs an afternoon.
- 02
Custom AI wrappers
A layer in front of your own logic, calling the functions your system already exposes. The model reads what somebody asked for, and your own rules decide what happens next.
- 03
Cost and rate control
Small models take the easy work, and the large one takes only what needs it. Caching and a hard ceiling on spend are built in rather than added after the first surprise.
Three weeks, first call to live
- Week one
01Endpoints and keys
We read what your system already exposes and pick the calls the wrapper will make. Keys move to the server, and a spend ceiling goes on before anything else runs.
- Week two
02Wiring and rate limits
The wrapper goes in, with caching and a fallback for the moment the model is slow. Retention is switched off at the endpoint and then checked.
- Week three
03Tuning and handover
We watch token spend against real traffic and move the cheap work to a smaller model. You finish holding the keys and the prompts, with a record of every decision made.
Training a model against calling one
Both end with software that does something intelligent. They differ in what you spend to get there and what you are left maintaining.
| Measure | Training a custom model | Integrating an LLM API |
|---|---|---|
| Time to first result | Months of data work | Days |
| What it needs | Labelled data you may not have | An endpoint you already expose |
| Ongoing cost | Training runs and hosting | Tokens, and a ceiling on them |
| When the field moves | Retrain, or fall behind | Change one setting |
| Who maintains it | Somebody who knows the model | Whoever holds the keys |
Four systems, four API integrations
Each of these is a live application with an API and a job the model does behind it.
Retail
Stock that says when it will run out
An electronics inventory system already knows what sold and what is still on the shelf. An endpoint over that history predicts the stockouts and flags the lines whose valuation has drifted.
Consulting
Transcripts that never leave your control
A live video consultation produces a transcript worth summarising and too sensitive to send anywhere. It goes through an endpoint with retention switched off, or a model on hardware you own.
Communities
A feed that moderates itself first
A closed community generates more posts than anybody reads. The API reads each one against your own rules and sends a person only what it could not decide.
Where the calls actually go
The endpoint you call decides where your data sits, and that choice is made before anything is built. The same engineer stays with it, from the first call right through to the handover.
- Where it runs
- A hosted endpoint with retention off, or an open weight model on hardware you own.
- Who holds the keys
- You do, in your own account, and from the day the first call goes out.
- What it costs to stop
- Nothing. The wrapper lifts out and nothing underneath it has changed.
The models and frameworks we use
We fit the AI into the systems you already run. Nothing on this list is a requirement, and the work goes ahead against whatever your software was built on.
- Model APIs
- ClaudeDocuments nobody wants to readGPTGeneral purpose workGeminiLong files and videoMistralSmall and cheap to run
- What we plug into
- PythonWhere the automation livesTypeScriptWeb and APIsLaravelPHP systems you already runReactScreens your team uses
- Around the calls
- RedisQueues and cachingPostgreSQLRecords and reportingpgvectorYour documents, made searchablen8nSteps joined into a workflow
- Where it runs
- DockerSame everywhere it runsAWSHosting and storageMCPModels plugged into your tools
What people sayNot our words.
Not our words.
Theirs.
Every quote here is a real Trustpilot review. We did choose which ones to show you. The score beside them is the part we do not control, and it counts all 29 reviews.
Trustpilot4.4out of 5Excellent29 reviews · checked 19 August 2026Read all of them
These reviews are for Appkodes, our software product division.
A Joysale client on the product and the service
He runs a marketplace built on Joysale, our Letgo style product. The clip is his own account of working with us.
A Fantacy client on the build
Fantacy is our Amazon style retail product. He goes through what was built and how the work ran.
An Airfinch client, filmed after his written review
Airfinch is our Airbnb style rentals product. He had already left the same review on GoodFirms before recording this.
A second Joysale client on the same product
Another marketplace running on Joysale. Worth watching beside the first, since the two bought the same thing.
Trustpilot
I've worked with Appkodes for 7 years on 4 different projects. We constantly require support or the implementation of new features, and we have the guarantee that the quality of their work remains the same throughout this time.
Juan VásquezSep 2025Trustpilot
Appkodes exceeded all of our expectations! From the very first contact, the team demonstrated a high level of professionalism, technical expertise, and commitment to quality.
Global SoftwinMay 2025Trustpilot
Appkodes team helped me to launch my healthcare application very quickly. Their software was very close to my requirements and adding some extra features made my project easy.
WassimApr 2025Trustpilot
I so much love your services and I will continue to patronize your company.
Kolawole Alaba JohnsonApr 2025Trustpilot
I worked with AppKodes for a website and mobile app development project, and overall, I'm very satisfied with the results. Their team was responsive and flexible throughout the process, and they delivered a product that met my expectations both in design and functionality.
Яша ФирузApr 2025Trustpilot
It was a good experience working with the team. They understood my ideas clearly and built everything as expected. The team was supportive, quick to respond, and helped me whenever I needed changes. Thank you for your hard work and support!
Prem SharmaApr 2025Trustpilot
I have got a mobile app project going on successfully with the team. Their Support is good. turn around time for any requirement is great. Every detail of my app is meticulously designed. THANK YOU APPKODES.
Fast Fiber NetworksApr 2025Trustpilot
Appkodes is a leader in developing high-quality applications and websites. It was a pleasure working with them, and this certainly won’t be our last collaboration. My experience was exceptional, they developed an outstanding app and website, with smooth and refined interactions.
BaderApr 2025Trustpilot
Overall very good experience. I have been availing services for past 3 years. They are available for discussions and resolving issues whenever we faced any. Mr. Saravana has been looking after our project and I'm very much happy with his timely response. I would definetely recommend.
Vannala RajuApr 2025Trustpilot
Initially, I was hesitant to deal with them, believing their customer service would be poor. However, I was surprised. They act with great responsibility and professional efficiency. My regards to them.
Ahmed NhariApr 2024Trustpilot
You have been supporting me very quickly in every matter, especially in the last 2 months, and this makes me very happy.
Deniz SeçerJan 2024Trustpilot
Very professional. Our project was quite complex and they covered all the aspects. Appkodes did an amazing and professional job developing and creating our Apple and Android apps. I was positively impressed with the communication you can absolutely trust on what they say.
Anu JosephJul 2023Trustpilot
Mani and Saravanan of the Appkodes team are amazing, they have done the best to create and support my project! I give them 10/10 stars for their efforts and work!
Joely CineasJul 2023Trustpilot
It was really great, they are there for me whenever I had a problem or to fix something. Thank you so much Ameer
GomezApr 2023Trustpilot
I've been working with Appkodes for almost a year and i can recommend them to work with as they are so much friendly and professional and you can clearly see it once you start your project right away. They are intact and they are transparent with their communication.
JohnFeb 2023Trustpilot
I have to be honest, sometimes it's hard to find a company or someone abroad to do your project. Not only might you waste your time and money, there is this thing called trust. In business you must trust the person you are dealing with.
Zack GizawDec 202216 of 29 reviews, plus 4 videos
Businesses we have built for
Frequently asked questions
What happens to user data pushed through a third-party LLM API?
It goes to an enterprise endpoint with retention switched off, so your inputs are processed and not kept. Where that is not enough, an open weight model runs on hardware you control and the data never leaves it.
How do you keep API costs from growing with usage?
Three levers, all of them set up during the build rather than after a large invoice. Cheap work goes to a smaller model, repeat questions come from a cache, and a hard ceiling stops spend before it surprises anybody.
Can you use Claude and OpenAI in the same integration?
Yes, and it is usually worth doing. Model choice sits behind the wrapper as a setting. One can handle documents while another answers questions, and either can be swapped without touching your system.
Do we have to rebuild the app to add this?
No. The wrapper calls the API your software already exposes. Your release process and the screens your users know all stay exactly as they are.
Who holds the API keys?
You do. The keys live in your own provider account, and they do so from the first call. They stay server side, never shipped to a browser.
What happens when the model is slow or unavailable?
The wrapper falls back rather than hanging. A timeout returns the answer your system would have given before the integration existed, so a slow model never becomes a broken screen.
Next stepLet AI do the repetitive
Let AI do the repetitive
half of the job.
Data entry, answering the same tickets, chasing numbers between systems. We automate the parts that repeat. Your team keeps the parts that need judgement.
