Software Development Kit(SDK)
Definition
A bundled set of libraries, tools, and documentation that helps developers build applications for a particular platform or service.In-Depth Explanation
An SDK packages the building blocks a developer needs to integrate with a platform: client libraries, code samples, and reference docs, often across several programming languages. AI providers ship SDKs (for example, Python and TypeScript clients) that wrap their REST APIs, handling authentication, request formatting, and response parsing. An SDK is broader than an API: the API is the interface, while the SDK is the toolkit that makes calling it easier. An official SDK signals a mature developer platform.
Real-World Example
OpenAI's Python SDK lets a developer call the API in a few lines instead of writing raw HTTP requests.