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agent-sdk-no-key

v1.0.0

Published

Proves the Claude Agent SDK works without an API key using your existing Claude Code subscription auth

Vulnerabilities

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  • 0Medium
  • 0Low

Links

Git

Maintainers

robzolkosrobzolkos

Keywords

claudeagent-sdkanthropicclaude-code

Readme

Agent SDK without an API Key

Proves that the Claude Agent SDK works without ANTHROPIC_API_KEY when you're already logged into Claude Code via a Pro/Max subscription.

Try it

npx agent-sdk-no-key

Expected output

🔑 ANTHROPIC_API_KEY set: false
🚀 Spawning Agent SDK session...

⏱️  Session created in 0.0s
🔧 Init — model: claude-haiku-4-5-20251001, session: 6186c6d9-...
💬 Assistant: Hi there! 👋 How can I help you today?

✅ Result: Hi there! 👋 How can I help you today?
⏱️  Total: 2.7s

Inspiration

"We want to encourage local development and experimentation with the Agent SDK and claude -p. If you're building a business on top of the Agent SDK, you should use an API key instead. We'll make sure that's clearer in our docs."

— Thariq (@trq212), Feb 18 2026

Why this matters

The official docs say you need an API key from the Anthropic Console. In practice, the Agent SDK spawns the same Claude Code CLI under the hood, which picks up your existing subscription auth from ~/.claude/.

Prerequisites

  • Node.js >= 20
  • Logged into Claude Code (claude CLI) with a Pro or Max subscription