21st Agents SDK

21st Agents SDK provides a rapid development environment for integrating advanced agents into applications. Key features include: • Define agents using TypeScript • One-command deployment with built-in infrastructure • Embeddable chat interface with streaming and session management • Integrated usage billing and observability tools This SDK is designed to abstract away the complexities of deployment and infrastructure, allowing developers to concentrate on crafting unique agent logic and functionality. It supports various runtimes like Claude Code and Codex, offering sandboxed execution environments, file access, and robust tool use capabilities. The platform ensures reliability with auto-retries, rate limiting, and graceful recovery mechanisms, providing a stable foundation for any application. The SDK's drop-in chat component simplifies front-end integration, featuring real-time, token-by-token streaming with markdown rendering, delivering a responsive user experience. Developers gain comprehensive insights through session replay and traces, enabling quick debugging and performance monitoring of agent interactions. Detailed usage tracking and spend limits per user are also included for effective resource management. Ideal for software development teams building interactive applications, customer service platforms, or any product requiring sophisticated digital assistants. The SDK accelerates development cycles, reduces operational overhead, and ensures scalability in production environments.