403 Forbidden on POST /runs/multipart despite valid API key

The exact error: 403 Client Error: Forbidden for url: https://api.smith.langchain.com/runs/multipart

That curl -H “x-api-key: …” https://api.smith.langchain.com/info returns 200 successfully

Your LangSmith SDK version (pip show langsmith)

That env vars are loading correctly but tracing still fails

@Bhanu - can you please double check that you’re using the correct API URL depending on what region your LangSmith organization was created in?