Fix 403 error in load_features() by adding proper User-Agent header #62
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The Python SDK was failing with 403 errors when calling load_features()
because urllib3.PoolManager() sends minimal headers by default. Some
servers (including self-hosted GrowthBook instances) block requests
without proper User-Agent headers.
This fix adds a proper User-Agent header in the format:
'GrowthBook-Python-SDK/{version}' to all HTTP requests made by the SDK.
Fixes load_features() 403 errors on self-hosted GrowthBook instances.
Tested with GrowthBook API endpoints and confirmed working.
vazarkevych
approved these changes
Sep 24, 2025
Collaborator
|
Great fix, small and safe change. Approved. |
# Conflicts: # growthbook/growthbook.py
# Conflicts: # growthbook/growthbook.py
Collaborator
|
Thank you for your contribution! |
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Summary
load_features()method on self-hosted GrowthBook instancesGrowthBook-Python-SDK/{version}formatProblem
The Python SDK was failing with 403 errors when calling
load_features()becauseurllib3.PoolManager()sends minimalheaders by default. Some servers (particularly self-hosted GrowthBook instances with WAF/nginx protection) block
requests without proper User-Agent headers.
Solution
Modified the
_get()method inFeatureRepositoryclass to include a proper User-Agent header for all HTTP requests.Testing
load_features()now works on self-hosted instancesImpact