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Claude Agent SDK

MIT-licensed Python and TypeScript SDKs exposing the agent loop that powers Claude Code

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What Claude Agent SDK does

  • MIT-licensed Python and TypeScript SDKs exposing the agent loop that powers Claude Code
  • Built-in tools for files, shell and MCP with custom tool support
  • Bring an Anthropic API key; the SDK itself costs nothing

Claude Agent SDK — straight answers

What is Claude Agent SDK?

Claude Agent SDK is listed under Agent Frameworks (Developers), in the AI Agents & Automation category on Flocci AI Tools. MIT-licensed Python and TypeScript SDKs exposing the agent loop that powers Claude Code. It is free, with no paid plan attached, and it lives at github.com.

Is Claude Agent SDK free?

Claude Agent SDK is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 399 entries on Flocci AI Tools with no upgrade path built in.

What can Claude Agent SDK do?

Claude Agent SDK does 3 things the catalog singles out: Mit-licensed python and typescript sdks exposing the agent loop that powers claude code; built-in tools for files, shell and mcp with custom tool support; bring an anthropic api key; the sdk itself costs nothing.

What is the best free alternative to Claude Agent SDK?

Agno is the closest free alternative: it sits in the same Agent Frameworks (Developers) sub-category and is free. AWS Strands Agents, CAMEL and Cloudflare Agents SDK also start free. The full list is on the alternatives page.

See the full list →

Claude Agent SDK alternatives

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LangGraph

Agent Frameworks (Developers)
free
  • Build stateful, multi-agent apps as graphs
  • Human-in-the-loop and durable execution
  • Works with any LLM
  • Open-source with a hosted platform
Visit

CrewAI

Agent Frameworks (Developers)
freemium
  • Role-based multi-agent 'crews'
  • Simple Python API for collaboration
  • Tasks, tools and flows
  • Open-source core
Visit

OpenAI Agents SDK

Agent Frameworks (Developers)
free
  • Lightweight agent orchestration from OpenAI
  • Agent handoffs, guardrails and tracing
  • Tool and function calling built in
  • Open-source, pay only for model usage
Visit

Microsoft AutoGen

Agent Frameworks (Developers)
free
  • Multi-agent conversation framework
  • Event-driven, async agent design
  • Studio UI for prototyping
  • Fully open-source
Visit

LlamaIndex

Agent Frameworks (Developers)
freemium
  • Leading framework for RAG and data agents
  • Connect LLMs to your documents & APIs
  • Agentic document workflows
  • Open-source with a hosted cloud
Visit

Google Agent Development Kit (ADK)

Agent Frameworks (Developers)
free
  • Open-source Python/Java framework from Google for building multi-agent systems
  • Native integration with Vertex AI Agent Engine and Gemini models
  • Model-agnostic — works with non-Google LLMs via LiteLLM
Visit

Head-to-head comparisons

Claude Agent SDK vs LangGraphClaude Agent SDK vs CrewAIClaude Agent SDK vs OpenAI Agents SDKClaude Agent SDK vs Microsoft AutoGenClaude Agent SDK vs LlamaIndexClaude Agent SDK vs Google Agent Development Kit (ADK)