botocore

botocore is the low-level, data-driven core of boto3 and the AWS CLI, providing a direct interface to Amazon Web Services APIs. It handles request signing (AWS Signature Version 4), credential resolution, retry logic, pagination, and service model loading. Current version is 1.42.77, released by Amazon Web Services. Releases are extremely frequent — often multiple times per week — tracking new and updated AWS service APIs. Most users interact with botocore indirectly via boto3, but direct use is common for fine-grained control, event hooks, custom credential providers, and low-overhead Lambda code.