Custom API Development
APIs are the connective tissue of modern software. Whether you need RESTful endpoints, GraphQL schemas, or microservices architecture, we build APIs that handle scale, security, and the complexity of real-world integrations. Clean contracts, comprehensive documentation, and the reliability your developers depend on.
What We Build
From simple REST endpoints to complex microservices ecosystems, we architect APIs that power modern applications.
RESTful APIs
Standard REST endpoints with proper HTTP methods, versioning, and documentation. Industry-standard patterns that integrate seamlessly with any frontend or third-party service.
GraphQL APIs
Type-safe, efficient data fetching with single-endpoint flexibility. Perfect for complex data requirements and mobile applications where bandwidth matters.
Microservices Architecture
Decomposed services that scale independently. Event-driven communication, service discovery, and the resilience patterns that keep distributed systems running.
Third-Party Integrations
Connect your systems to payment processors, CRMs, analytics platforms, and any external service. Reliable webhooks, OAuth flows, and error handling that doesn't break.
API Development Capabilities
Security, scalability, and developer experience - the three pillars of production-grade APIs.
Security First
OAuth 2.0, JWT authentication, API key management, and rate limiting. Your API is a gateway to your data - we treat it like one.
Built to Scale
Caching strategies, database optimization, and load balancing that handles traffic spikes. Your API grows with your business without rewrites.
Developer Experience
OpenAPI/Swagger documentation, SDK generation, and clear error messages. Your developers actually enjoy working with our APIs.
Our API Development Process
From contract design to production deployment, we follow a proven process that minimizes breaking changes and maximizes adoption.
Define Contracts
API design sessions where we map endpoints, data models, and authentication flows. Get it right on paper before writing code.
Build & Document
Develop APIs with automated testing and generate documentation that stays in sync. No stale docs, no undocumented endpoints.
Deploy & Monitor
Production deployments with logging, metrics, and alerting. Know what's happening in your API before it becomes a problem.
Why Choose Hexmount
API development requires understanding both technical implementation and developer experience. We excel at both.
API Design Expertise
We've built APIs handling millions of requests daily for fintech, Web3, and enterprise systems. This isn't our first rodeo.
End-to-End Ownership
From architecture design to deployment and monitoring, we handle the full stack. No gaps, no handoffs, no surprises.
Production-Grade Standards
Versioning, deprecation policies, comprehensive logging, and the monitoring that tells you when something breaks before your users do.
Integration Support
We help your team integrate with the APIs we build. Documentation, example code, and the support that makes adoption smooth.
Ready to Build Your API?
Whether you need a simple REST API, a complex GraphQL schema, or microservices architecture, we can help you design and build APIs that your developers will actually enjoy using.
We choose our clients as much as they choose us. Let's see if we're a fit.