AI model integration
Add OpenAI, Anthropic Claude or Google Gemini features to your existing website, app or internal tools.
API Integration Services
API integration services for AI, payments, CRMs and ERPs
We connect the software your business runs on, so data moves between systems automatically instead of being copied by hand. AI models, payments, CRMs, ERPs, shops and your own apps — reliable, secure and documented.
- OpenAI, Claude and Gemini in your own apps
- Stripe, PayPal, HubSpot, Salesforce CRM and more
- Error alerts and automatic retries
- Documented so any developer can maintain it
What is an API integration?
An API integration is a connection that lets two pieces of software exchange data automatically through their application programming interfaces (APIs). For example, when a customer pays in your shop, an integration can create the invoice in your accounting software and update the contact in your CRM — without anyone copying the details by hand.
What we build
Integrations we build
Payments and subscriptions
Stripe and PayPal checkouts, subscriptions, invoices and webhooks that keep your records in sync.
CRM and marketing tools
Send leads and customer activity to HubSpot, Salesforce CRM, Mailchimp and similar tools automatically.
ERP, accounting and inventory
Keep orders, stock and invoices in sync between your shop or app and your back-office systems.
Custom APIs for your app
Build a secure API so your mobile app, partners or other systems can use your data.
Data sync and webhooks
Scheduled syncs and real-time webhooks between any two systems that offer an API.
How it works
How we build reliable integrations
First we map what should happen: which system is the source of truth, what triggers a sync, which fields go where, and what should happen when something fails. We check both systems' API documentation and limits, so there are no surprises later.
We then build the connection with proper authentication, validation and logging. Integrations fail in real life — a service is down, a token expires, data arrives in the wrong format — so we add automatic retries and alerts, and nothing is lost quietly.
Before going live we test with real examples in a safe environment. You get written documentation of how the integration works and where its settings live, so any developer can maintain it later.
- REST
- GraphQL
- Webhooks
- OAuth
- OpenAI
- Claude
- Gemini
- Stripe
- PayPal
- HubSpot
- Salesforce CRM
- Laravel
- Node.js
- Python
What's included
- A map of the data flow and field mapping
- Secure authentication and key storage
- Real-time webhooks or scheduled syncs
- Error handling, retries and alerts
- Logs of every sync
- Testing with real examples
- Written documentation
- Full source code handed over to you
Process
From first message to launch
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1
Tell us what to connect
List the systems and what should happen between them. Within one business day you get questions, a plan and a fixed-price quote.
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2
We build and test
We build the integration and test it with real examples in a safe environment before it touches live data.
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3
Go live and monitor
We switch it on, watch the first syncs and set up alerts. Bug fixes after launch are free.
Pricing
How much does an API integration cost?
The cost depends on how many systems are connected, how good their APIs and documentation are, how much data needs mapping or cleaning, and whether the sync must be real-time. A one-way connection between two well-documented services is a small job; two-way syncs between several systems take more planning and testing. Tell us what you want to connect and we will send a fixed price, free, within one business day.
Client reviews
What clients say
207 of 217 reviews are 5 stars on Fiverr“This is one of the best things that has been done for my business. The preciseness and level of detail is 2nd to none.”
“Very happy to work with Jawad, he listened to my concerns and always responded on time and made quite a few revisions when needed. 100% recommend!”
“Honestly, working with Anjtec has been one of the best experiences I've had working with a Fiverr freelancer. He is clear, communicative, and delivers excellent results in a very timely manner. Looking forward to working with him again!”
“Very good at what he does! He was professional, delivered high quality work.”
“His code expertise and impeccable attention to detail truly exceeded my expectations. Working with him was a breeze — always polite, timely, and consistently going above and beyond. I highly recommend him!”
“We were working together on the creation of my webapp. He was a very big help for me. The design solutions anjtec provided were awesome. Thank you very much :)”
“Jawad is good to work with. He is patient, hard working, reliable and gives great value.”
“I have nothing to say but perfect. Perfect work, perfect communication, just pure professionalism. I'm already planning to do another task with him.”
“My project was already late but this guy delivered my project in 24 hours and as I described. Perfect work.”
FAQ
API Integration Services questions
Which systems can you integrate?
Almost any system that offers an API or webhooks: AI models, payment providers, CRMs, ERPs, accounting software, shops, marketing tools and your own database.
What if a system doesn't have an API?
There are often other options, such as file exports, email parsing or an automation platform. We will tell you honestly what is reliable.
What happens if an integration fails?
We build in automatic retries and alerts, and log every sync, so problems are noticed and fixed instead of silently losing data.
Can you add AI to my existing app?
Yes. We can add OpenAI, Claude or Gemini features such as summaries, search, writing help or a chatbot to your current website or software.
Is my data secure?
We use each provider's recommended authentication, keep keys in secure settings rather than in code, and give each connection only the access it needs.
Do you maintain integrations after launch?
Yes. APIs change over time, so we offer ongoing support and updates, quoted to fit your integrations.
Ready to talk about your project?
Send a few lines and get a fixed-price quote within one business day — free, with no obligation.