Anthropic Releases Claude Agent SDK for Autonomous Task Execution Anthropic's new Claude Agent SDK enables developers to build fully autonomous AI agents that can execute multi-step tasks, use tools, and integrate with external services via MCP. A major milestone for the agent economy. Anthropic's new Claude Agent SDK enables developers to build fully autonomous AI agents that can execute multi-step tasks, use tools, and integrate with external services via MCP. A major milestone for the agent economy. Published: 2026-03-18