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Claude Agent SDK

The Claude Code loop as a library.

currentAnthropic ↗Verified 2026-08-13

Same loop

as Claude Code

Specifications

ModelHarness
LanguagePython, TS
MCP supportYes
StatusActive

Official links

Anthropic official site

What matters

  • Renamed from Claude Code SDK in March 2026
  • Tools, bash and a full agentic loop

Best for custom agents.

Compare with

All 5 side by side →

Claude Agent SDK vs LangGraph →Claude Agent SDK vs DSPy →Claude Agent SDK vs CrewAI →Claude Agent SDK vs Pydantic AI →Claude Agent SDK vs AutoGen →

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