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[GH-ISSUE #4388] Accept or Ignore additional headers in OpenAI compatible endpoints #64778

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opened 2026-05-03 18:46:29 -05:00 by GiteaMirror · 1 comment
GiteaMirror commented 2026-05-03 18:46:29 -05:00
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Originally created by @UdaraJay on GitHub (May 13, 2024).
Original GitHub issue: https://github.com/ollama/ollama/issues/4388

Originally assigned to: @jmorganca on GitHub.

The OpenAI javascript SDK adds some x-stainless-* headers to API calls that cause preflight checks to fail against Ollama's API when switching out the baseUrl for Ollama's v1/chat/completions endpoint.

Access to fetch at 'http://localhost:11434/v1/chat/completions' from origin 'http://localhost' has been blocked by CORS policy: Request header field x-stainless-os is not allowed by Access-Control-Allow-Headers in preflight response.

Would be great if you could configure cors in more detail when running the server or if these additional headers are ignored or accepted as they can't be disabled on the SDK unless you modify the library.

Originally created by @UdaraJay on GitHub (May 13, 2024). Original GitHub issue: https://github.com/ollama/ollama/issues/4388 Originally assigned to: @jmorganca on GitHub. The OpenAI javascript SDK adds some `x-stainless-*` headers to API calls that cause preflight checks to fail against Ollama's API when switching out the baseUrl for Ollama's `v1/chat/completions` endpoint. ``` Access to fetch at 'http://localhost:11434/v1/chat/completions' from origin 'http://localhost' has been blocked by CORS policy: Request header field x-stainless-os is not allowed by Access-Control-Allow-Headers in preflight response. ``` Would be great if you could configure cors in more detail when running the server or if these additional headers are ignored or accepted as they can't be disabled on the SDK unless you modify the library.
GiteaMirror added the bug label 2026-05-03 18:46:29 -05:00
GiteaMirror commented 2026-05-03 18:46:32 -05:00
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@jmorganca commented on GitHub (May 13, 2024):

Thanks for the issue!

<!-- gh-comment-id:2106572467 --> @jmorganca commented on GitHub (May 13, 2024): Thanks for the issue!
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Reference: github-starred/ollama#64778
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