Unverified50% confidenceFactExact time
The Claude Agent SDK does not automatically load .env files; you need to set the ANTHROPIC_API_KEY environment variable in the shell running the agent, or manually load it via dotenv or similar before the SDK starts.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/27/2026
First Seen
Valid until: 1/25/2027
Sources
Claude Agent SDK in Practice: Building Your First AI Agent Step by Step
youtubeARE AGI10/27/2026
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