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, documentation. Industry patterns that integrate with any frontend or third-party service.
GraphQL APIs
Type-safe, efficient data fetching. Single endpoint, flexible queries. Good for complex data requirements and mobile apps where bandwidth matters.
Microservices Architecture
Services that scale independently. Event-driven communication, service discovery, resilience patterns for keeping distributed systems running.
Third-Party Integrations
Connect to payment processors, CRMs, analytics platforms, external services. Reliable webhooks, OAuth flows, 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, rate limiting. Your API is a gateway to your data. We treat it that way.
Built to Scale
Caching, database optimization, load balancing for traffic spikes. Your API grows with your business. No rewrites needed.
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 Experience
Built APIs handling millions of requests daily for fintech, Web3, enterprise systems. Not 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 Standards
Versioning, deprecation policies, comprehensive logging, monitoring that tells you when something breaks before your users notice.
Integration Support
We help your team integrate with the APIs we build. Documentation, example code, 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.