Claude Agent SDK

Build agents on the Claude Code harness

🧩 Agent frameworks open source / open weights

/ 100

Anthropic's SDK exposing the Claude Code agent loop, tools, and context management for custom agents.

You want Claude Code's proven agent loop inside your own product.

You need to use non-Claude models.

Score breakdown

Job fit20/30

Ease / time-to-first-result11/15

Value11/15

Momentum12/15

Openness & portability8/10

Trust & maturity9/10

Builder/gamer bonus5/5

Initial editorial estimate from public info; not yet hands-on tested. How we score →

Pricing: Free SDK; pay for Claude API usage
Unverified. Unverified: editorial summary. We couldn't confirm this on an official pricing page (JS-rendered, no public pricing, or usage-based) as of Oct 18, 2026.
Free tier: Yes (unverified)
Platforms: Python SDK · TypeScript SDK
Open source: Yes
Official URL: https://code.claude.com/docs/en/agent-sdk/overview
URL verified: Oct 18, 2026 (curl (followed redirect; official URL updated to destination))
Last reviewed: Oct 18, 2026 by agent
Sources: https://code.claude.com/docs/en/agent-sdk/overview