Spider Clients are lightweight, language-specific SDKs that communicate with a Spider orchestration server to coordinate AI agent tasks. Using HTTP requests, clients enable users to open interactive sessions, dispatch multi-step chains, register custom tools, and retrieve streaming AI responses in real time. They handle authentication, serialization of prompt templates, and error recovery under the hood, while maintaining consistent APIs across Node.js and Python. Developers can configure retry policies, log metadata, and integrate custom middleware to intercept requests. The CLI client supports quick testing and workflow prototyping the terminal. Together, these clients accelerate the development of AI-powered agents by abstracting low-level network and protocol details, allowing teams to focus on prompt design and logic orchestration.