At Orybite, we help businesses create dependable connections between their digital products, internal systems and external services. An API defines how software components request, exchange and validate information. When the interface is planned carefully, teams can connect multiple clients to shared business capabilities, reduce duplicated implementation and make integrations easier to understand. For a new product, an API may power account creation, profiles, product catalogues, orders, bookings, payments, notifications or administration features. For an existing business, it may connect a website to a CRM, synchronize selected records, expose approved data to a partner, or link a mobile application to backend services. The appropriate scope depends on the workflow, the systems involved and the sensitivity of the data. We start by clarifying the users and systems that will consume the API, what each caller is allowed to do, which data must be exchanged, and what should happen when requests fail. We define endpoint behavior, request and response structures, validation rules, authentication, authorization, error conventions and versioning before implementation. These decisions help client developers integrate against a predictable contract. API design also includes decisions beyond endpoint names. Pagination may be needed for large collections; rate limits may be required to protect service availability; caching may be appropriate for selected read operations; and asynchronous processing may help when an operation takes longer than a normal request. These choices should be based on actual product requirements rather than applied automatically. For integrations with external providers, we consider provider documentation, credential handling, sandbox access, request quotas, callback behavior, retries and provider-specific failure responses. We also identify responsibilities between Orybite, the client team and the external provider before development begins. Our approach is requirements-first rather than framework-first. We select a suitable implementation based on the current product stack, deployment environment, team capability and maintenance needs. We plan for testing, documentation, logging and future updates so the API can be understood and supported after release.