Environment Variables in FastAPI — Managing Secrets the Right Way
Posted on Tue 28 September 2027 in Tutorial • Tagged with FastAPI, Python, environment-variables, security, pydantic-settings, deployment
Why This Matters
Almost every FastAPI app eventually needs something it shouldn't have hardcoded in the source code: a database URL, an LLM API key, a JWT secret, a third-party service token. When you're building GenAI apps, this shows up on day one, because you can't call an LLM API …
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