Botocore is the core library for Boto, providing the low-level building blocks needed to work with Amazon Web Services (AWS) APIs. It’s useful for developers who want the underlying service clients, request/response handling, and authentication that higher-level AWS tooling builds on.
Project status
- Actively maintained (evidence-based): boto/botocore has very recent activity, with the last upstream push on 2026-07-15, and frequent updates to version 1.43.39 through 1.43.48 in early July 2026.
- Apparent cadence: releases, as reflected by these version bumps, appear to be near-daily or every few days during this window (1.43.39 on 2026-07-01, up to 1.43.48 on 2026-07-14), suggesting an ongoing development cycle rather than maintenance mode.
AI summary generated
Recent updates
1.43.50
Release 1.43.50 has no publisher release notes content provided. The code diff shows a botocore release that updates service models (adding fields and new operations, and deprecating Amazon Chime SDK Voice proxy-session APIs), plus CI/tooling action and formatter updates.
1.43.49
botocore 1.43.49 updates service models and API shapes across multiple AWS services, including Bedrock AgentCore Control, ELBv2, HealthLake, Payment Cryptography, and RDS. The publisher release notes were not provided, so changes documented only via repository artifacts (for example CHANGELOG) cannot be relied on for what developers actually experienced at runtime.
Features1.43.48
Release 1.43.48 updates botocore service models for multiple AWS services, adding several new APIs/fields (notably Amazon Connect SearchRules, DRS fast recovery support, and EMR on EKS Spark Connect session fields). The publisher release notes were not provided, but the repo changelog entries indicate the intended API additions and a servicediscovery endpoint fix. The code diff also reveals additional schema validation and endpoint-resolution behavior changes that are not called out at the same level of detail.
Features1.43.47
No publisher release notes were provided for 1.43.47, but the repository changelog and service model updates indicate multiple AWS API shape additions and validation changes across several services. The code diff shows botocore model updates (new parameters, new response shapes, updated endpoint availability, and updated client-side validation rules), plus a version bump to 1.43.47.
BreakingFeatures1.43.46
botocore 1.43.46 was released with a set of additive service model updates across CloudWatch, EC2, Inspector2, Lambda, License Manager, QuickSight, and SageMaker. The repository changes primarily add new API parameters/outputs, new enum values (instance types and rescan durations), and new service operations/shapes, with minimal evidence of true breaking changes.
Features1.43.45
Version 1.43.45 updates botocore service models to add multiple AWS API surface areas, primarily new operations (Amazon Connect) and additional request/response fields or optional parameters (EC2, IVS, Synthetics). The diff is overwhelmingly additive, with no obvious removals of existing operations or required-parameter changes to current APIs.
Features1.43.44
The publisher release notes were not provided for 1.43.44. The code changes introduce new AWS Sign-In OAuth 2.0 token operations (IAM-authenticated variants) and update endpoint resolution rules to target an OAuth-specific host. Additional internal naming and endpoint-behavior changes are present that are not explicitly called out in the available release notes content.
Features1.43.43
No publisher release notes were provided for version 1.43.43. The repo's CHANGELOG.rst lists multiple additive API model updates across AppConfig, Bedrock Agent Core, EC2, ECS, Geo Places, IoT Wireless, and Resilience Hub V2.
Features1.43.42
No release notes were provided in the <release_notes> payload for version 1.43.42. The code diff for 1.43.42 shows mostly additive botocore model updates (new API operations, new paginators/waiters, and updated request/response shapes) across multiple AWS services, plus a botocore version bump.
Features1.43.41
Release 1.43.41 contains primarily botocore model updates (service-2.json updates) that add new AWS API operations. No publisher release notes were provided, so the changes below are identified directly from the code diff.
1.43.40
No publisher release notes were provided for version 1.43.40. The repo changelog and the botocore service model diffs indicate multiple additive API model updates across Cognito IDP, AWS Config, Customer Profiles, MediaTailor, plus one notable Outposts validation tightening.
BreakingFeatures1.43.39
Release 1.43.39 contains primarily botocore service model updates that add new AWS API operations and new request/response shapes across multiple services. No publisher release notes were provided in the release record, so the changelog-like entries present in the diff are effectively not documented for this release from the publisher perspective.
Features1.43.38
Botocore was bumped from 1.43.37 to 1.43.38 and includes a large set of service model updates across many AWS APIs. The changes appear mostly additive (new API operations, shapes, paginators, and waiters), but there are also high-impact behavior and packaging changes visible in the diff.
BreakingFeatures1.43.37
Release 1.43.37 updates botocore models and metadata for multiple AWS services, primarily adding new API operations and request/response shapes. The repository also bumps tooling and CI action pins, and updates botocore package version from 1.43.36 to 1.43.37.
Features1.43.36
No publisher release notes were provided for 1.43.36. The repo changes add a changelog entry and update botocore's Kafka service model data, plus a version and documentation config bump.
1.43.35
Release 1.43.35 (botocore 1.43.35) introduces a set of additive AWS API model updates across multiple services, including new Application Signals instrumentation configuration operations, GuardDuty AI investigation operations, and CloudWatch Logs syslog configuration APIs. It also adds new AWS Lambda service models for Lambda Core (network connectors) and Lambda MicroVMs, plus related auth and request-model updates (for example, Kafka mTLS auth, and Bedrock Agent Core CreateEvent extractionMode). No publisher release notes were provided in the release payload.
BreakingFeatures1.43.34
Release 1.43.34 updates the botocore service models and documentation generation utilities. It adds multiple new AWS API operations (notably AppStream, Bedrock Agent, Connect, Glue, and OpenSearch) and also includes some model changes that can break existing client code due to renamed operations and renamed request/response members.
BreakingFeatures1.43.33
Release 1.43.33 updates botocore (version bump) and regenerates service model files across multiple AWS services. No publisher release notes were provided in the input, so developers should rely on the code diff to learn about API model and behavior changes.
1.43.32
Release 1.43.32 (published 2026-06-17) contains mostly additive API model updates across multiple AWS services, including new Bedrock Agent runtime operations, Glue data catalog search and glossary capabilities, Amazon MQ shared resource introspection, and additional DevOps Agent and Compute Optimizer automation capabilities. The provided GitHub release notes are effectively empty, so the repository changelog and the actual service model diffs are the only reliable signals of what changed.
Breaking1.43.31
Release 1.43.31 (botocore) adds several new API capabilities across multiple AWS services, including Direct Connect rate limiting, Outposts order creation from quotes, new Partner Central Selling prospecting APIs, S3 object annotations, S3 Vectors pagination for QueryVectors, and SageMaker detailed observability support. The repository also updates build workflow configuration and expands endpoint coverage for DataSync in the endpoint resolution data.
Features