Reserved environment variables
Last updated June 25, 2025
The following environment variable names are reserved and therefore unavailable for use:
AWS_SECRET_KEYAWS_EXECUTION_ENVAWS_LAMBDA_LOG_GROUP_NAMEAWS_LAMBDA_LOG_STREAM_NAMEAWS_LAMBDA_FUNCTION_NAMEAWS_LAMBDA_FUNCTION_MEMORY_SIZEAWS_LAMBDA_FUNCTION_VERSIONNOW_REGIONTZLAMBDA_TASK_ROOTLAMBDA_RUNTIME_DIR
The following environment variable names are allowed by Vercel Vercel Function runtimes:
AWS_ACCESS_KEY_IDAWS_SECRET_ACCESS_KEYAWS_SESSION_TOKENAWS_REGIONAWS_DEFAULT_REGION
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