How to Integrate DeepSeek API Securely in TypeScript Using the OpenAI SDK

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DeepSeek's API is compatible with the OpenAI SDK, allowing developers to integrate it into existing TypeScript pipelines by simply overriding the base URL and supplying a valid API key. The author demonstrates a secure setup using Next.js App Router Route Handlers, ensuring the API key remains server-side and is never exposed to the client. Environment variables stored in .env.local and configured via deployment platform dashboards are recommended to prevent credential leaks. DeepSeek offers two primary models — deepseek-chat for general use and deepseek-coder for code-focused tasks — though the author cautions that real-world performance must be evaluated independently. The core takeaway is that integration is straightforward, but determining whether the model suits a specific use case requires hands-on testing beyond marketing claims.

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