Five configuration checks to fix OpenAI-compatible API integration failures

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Most failures when integrating OpenAI-compatible APIs stem from configuration mismatches rather than SDK bugs. Developers should verify the base URL, API key, and exact model ID before writing any application code. Running a minimal cURL request first helps confirm the setup works independently of frameworks like LangChain or Dify. Reviewing request logs for model used, token count, failure reason, and cost can catch silent misrouting issues. The most frequent error is updating only the base URL while leaving an outdated key or model alias in place, often triggering 401 errors or unexpected charges.

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