Your business runs on many apps: a website, a CRM, an accounting package, a stock system, maybe a mobile app. When they cannot share data, your team ends up copying it by hand. Newton Byte provides API development for UK businesses that links these systems securely, so data flows automatically and new products can be built faster.
Trusted by startups, SMEs, and enterprise brands across the UK.
An API (application programming interface) is a set of rules that lets two pieces of software talk to each other. When you pay online, book an appointment or see live stock levels, an API is doing the work behind the scenes.
Many companies overlook their APIs until something breaks or a new partner needs access. Good API development gives you a stable, documented and secure way to share data with your own apps, partners and customers. It reduces manual work, prevents errors and makes it much easier to add new tools later. Well-built APIs help you:
We offer a complete range of API development services, from designing a single integration to building the full API layer behind your platform. We work with REST, GraphQL and webhooks using Node.js, Laravel, Python and .NET, and pair our APIs with solid backend development.
Custom APIs designed around your data and business rules, with clear documentation and versioning from day one.
Fast, secure REST and GraphQL APIs that power websites, mobile apps and partner integrations.
Connect your CRM, ERP, e-commerce, payment and shipping tools. See our payment gateway integration service.
Scalable cloud APIs with gateways, rate limiting and monitoring for larger businesses and high-traffic platforms.
We design clean API contracts, test them thoroughly and publish clear OpenAPI documentation your developers will love.
We offer our full-fledged ecommerce solutions to major businesses operating in various industries. Therefore, be it is startups or enterprises, we know the needs of custom online stores. So, if you are into retail, finance, manufacturing, logistics, or any other business, we are here to help you out.
We are your integration partner, not just a coding team. Our API development work follows recognised standards such as the OpenAPI Specification, so your APIs are easy to understand, extend and hand over. You can rely on:
We follow a structured API development process that keeps projects on time and on budget:
Simple integrations take two to four weeks. Larger API development projects are delivered in phases. For full products, see our custom software service.
Here are answers to common questions about API development and integration. Need more help? Contact our team.
API development is the process of designing, building and maintaining interfaces that let different software systems exchange data securely and automatically.
An experienced developer builds APIs that are secure, fast and well documented, avoiding the data leaks, outages and costly rewrites that poorly built integrations cause.
Our API development covers planning, design, build, automated testing, security, documentation, deployment and ongoing support.
Yes. We build REST APIs as standard and also offer GraphQL and webhook-based integrations where they suit your needs better.
Yes. We integrate CRMs, ERPs, payment gateways, shipping providers, marketing tools and many other third-party services.
It depends on the number of endpoints and integrations. A single integration is usually a small project, while a full API platform is priced in phases with fixed quotes.
Simple integrations take two to four weeks. A complete custom API with many endpoints typically takes six to twelve weeks.
We use HTTPS, OAuth 2.0 or API keys, input validation, rate limiting and logging, following OWASP API security guidance.
Yes. Every API we build comes with OpenAPI (Swagger) documentation and examples, so other developers can use it easily.
Yes. We audit existing APIs, fix bugs and security issues, improve speed and add new endpoints.
REST uses fixed endpoints for each resource. GraphQL lets the app request exactly the data it needs in one call. We recommend the best fit for your project.
Yes. This is one of the most common API development projects we deliver, keeping stock, orders and invoices in sync automatically.
Yes. We build the APIs that power iOS and Android apps. See our app development service.
Yes. We can build secure partner or public APIs with access controls, usage limits and developer documentation.
Yes. We set up monitoring and alerts for uptime, errors and response times, and fix issues quickly on a support plan.
You do. All code and documentation belong to your business once the project is paid for.
Yes. We deliver API development for clients in the UK, UAE, USA and Pakistan.
Book a free consultation through our Let’s Talk page and tell us which systems you want to connect.
