@anthropic-ai/sdk

Official TypeScript client for Claude: deploy models like Claude 3.5 Sonnet into Node.js or browser environments with native type safety.

This SDK serves as the primary gateway for Anthropic's Claude models (3.5 Sonnet, 3.0 Opus) across Node.js, Bun, and browser runtimes. It handles the heavy lifting for streaming responses via Server-Sent Events (SSE), processing vision inputs, and executing tool use (function calling) for agentic workflows. You get production-ready features out of the box: automatic retries, custom timeouts, and strict TypeScript definitions for every API endpoint. Get started with a single command: npm install @anthropic-ai/sdk.

https://github.com/anthropics/anthropic-sdk-typescript