API Design & Development
An API is a contract between systems, and a poorly designed one becomes expensive technical debt. We design and build REST and GraphQL APIs that are consistent, secure, and documented well enough that other teams can integrate without asking you questions. Whether you are exposing data to partners or connecting your own services, we build APIs that hold up under real traffic.
REST and GraphQL, Designed for Consumers
We choose between REST and GraphQL based on how the API will be used. REST suits straightforward resource access with predictable caching, while GraphQL fits clients that need flexible queries and want to avoid over-fetching. Whichever we use, we design consistent naming, predictable error responses, sensible pagination, and clear status codes so the API behaves the way developers expect. A well-designed API reduces integration time for everyone who consumes it, whether that is your mobile app, a partner, or another internal service.
Versioning, Rate Limiting, and Reliability
APIs evolve, so we plan for change from the start. Versioning lets you ship improvements without breaking existing clients, and we manage deprecation with clear timelines. Rate limiting and throttling protect your services from abuse and traffic spikes, while caching keeps response times low. We add health checks, retries, and graceful degradation so a single slow dependency does not bring everything down. For high-traffic APIs we design for horizontal scaling, ensuring the service stays responsive as the number of consumers grows.
Authentication, Security, and Documentation
We secure APIs with appropriate authentication, typically API keys, OAuth 2.0, or JSON Web Tokens, scoped so each client can only access what it should. Inputs are validated, payloads are size-limited, and we follow practices that guard against common API attacks. Every endpoint is documented, usually with an OpenAPI or GraphQL schema, so consumers get accurate, machine-readable references and interactive docs. Good documentation cuts support requests dramatically and is often the difference between an API that gets adopted and one that frustrates the teams meant to use it.
Integrating Third-Party APIs
Many projects involve consuming external APIs as much as building them, from payment processors to mapping, messaging, and logistics services. We integrate these reliably, handling authentication, rate limits, retries, and the failure modes that external services inevitably have. We wrap third-party calls behind our own interfaces so a vendor's outage or breaking change is contained rather than spreading through your application. Webhooks are handled idempotently so duplicate deliveries do not cause double processing, keeping your data consistent.
What You Get
- REST or GraphQL API with consistent, documented endpoints
- Authentication via API keys, OAuth 2.0, or JWT
- Versioning strategy and deprecation handling
- Rate limiting, throttling, and caching configuration
- OpenAPI or GraphQL schema with interactive documentation
- Third-party API integrations with resilient error handling
Why Teams Choose Turn Global
- APIs designed for the developers who will consume them
- Built to evolve safely through versioning and deprecation
- Security, rate limiting, and reliability handled by default
- Documentation thorough enough to cut integration support
Ready to Start?
Contact our team and we will send the best implementation plan for your business.