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API Development Services That Connect Your Systems and Your AI

Valletta Software designs, builds, and integrates REST and GraphQL APIs, including the tool and LLM APIs that power AI agents. A dedicated team is ready in 48 hours.

API Development Services That Connect Your Systems and Your AI

What API Development Services Cover

Definition and scope of what our engineers deliver.

API development services cover the design, building, and maintenance of the interfaces that let software applications exchange data and functionality. Valletta Software has delivered software since 2009, with 1000+ projects and 200+ engineers across 15+ years of work from Malta in the EU. We build REST and GraphQL APIs on Node.js and .NET, add webhooks for real-time events, and secure every endpoint with OAuth. Our AI-first delivery means each API ships with versioning, clear documentation, and a security model, so your teams and third-party partners can consume it with confidence.

Integration, AI-Ready APIs, and Pricing

How we connect third-party systems, build APIs for AI, and structure cost.

Beyond building new APIs, we connect your product to third-party systems, from payment providers to CRMs, and expose your own data through clean, documented endpoints. For AI-era needs, we handle LLM API integration and build the tool and agent APIs that let language models call your services safely. Projects fall into three brackets: small work under $35,000, average engagements from $35,000 to $100,000, and large builds above $100,000. Recognized as a Clutch Global 2025 leader and an Upwork Elite Partner, we respond within 24 hours and can assign a dedicated team within 48 hours.

Common questions about API development, from REST versus GraphQL to cost, integrations, and AI-ready APIs.

What are API development services?

What is the difference between REST and GraphQL APIs?

How much does API development cost?

Can you integrate third-party APIs?

Can you build APIs for AI and LLM apps?

🚀 Valletta Software Development: Your Partner in Software Excellence

Thank you for considering Valletta Software Development for your software testing and quality assurance needs. We are excited about the opportunity to work with you and demonstrate our commitment to excellence. With our expertise, innovative solutions, and unwavering dedication to quality, we are ready to help you achieve and exceed your software goals.

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