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: botocore shows recent updates on 2026-06-10 and 2026-06-09, and the last upstream push was on 2026-06-10, indicating ongoing development.
- Update cadence: over the last ~2 weeks the versions advanced frequently (roughly daily, with some multi-day gaps), consistent with a steady stream of incremental model and behavior updates.
AI summary generated 2026-06-11
Recent updates
1.43.29
2026-06-12This release primarily updates botocore service models, adding new API surface area across multiple AWS services (notably DevOps Agent triggers, Glue Iceberg metadata retrieval, Bedrock AgentCore insights, and SageMaker inline payload support). There are also behavior-affecting client-side model/validation changes, including ACM certificate transparency opt-out being deprecated and Firehose encryption KeyARN validation tightening.
BreakingFeatures1.43.28
2026-06-11No publisher release notes were provided for 1.43.28. The code change set primarily updates botocore service model definitions across multiple AWS services, adding new API operations, request parameters, and response fields (for example HealthLake UpdateFHIRDatastore, EKS Outposts local cluster placement parameters, Neptune DUAL networking, and Omics workflowName in ListRuns). The diff also includes schema validation and enum expansion changes that could affect client-side validation or strict response handling.
Features1.43.27
2026-06-10Version 1.43.27 updates botocore service models across multiple AWS services, adding new API shapes, parameters, and operations (notably AMP, Connect Health, EC2, ECS, Lightsail, MediaLive, SageMaker, and Sign-In). The publisher-provided release notes are missing, but the repository changelog indicates these are primarily additive API expansions.
Features1.43.26
2026-06-09Release 1.43.26 mainly adds new AWS service models and operations across Bedrock, CloudWatch, EC2, ODB, and Outposts, along with updating the SDK error shapes for one Bedrock Agent Core operation. The provided publisher release notes are missing, but the repository changelog and change fragments document the API additions mentioned in the code.
Features1.43.25
2026-06-08botocore version 1.43.25 updates the AWS service models for multiple APIs, primarily adding new operations and expanding request/response shapes. The provided publisher release notes are empty, so the detailed API-level changes are only visible via the in-repo changelog and the underlying model diffs.
Features1.43.24
2026-06-05No publisher release notes were provided for version 1.43.24. The code diff shows a botocore service model update that adds or adjusts API shapes across multiple AWS services, plus a botocore version bump.
1.43.23
2026-06-04This release bumps botocore from 1.43.22 to 1.43.23 and updates botocore service models across multiple AWS services. The main documented theme is adding new API surface area (notably Spark Connect session support for EMR and Glue, plus new/updated parameters and operations for several services) and updating endpoint-rules representations.
BreakingFeatures1.43.22
2026-06-03No release notes were provided by the publisher for version 1.43.22. The code diff shows this release is primarily additive, updating botocore service models and API mappings to introduce new API capabilities across multiple AWS services.
Features1.43.21
2026-06-03Release 1.43.21 (botocore) updates endpoint routing logic, primarily around the geo-routes endpoint-rule set and related endpoint-rule evaluation. The publisher release notes were not provided, so these changes are effectively undocumented from the standpoint of the release-notes text.
1.43.20
2026-06-02No release notes were provided in the <release_notes> section for version 1.43.20. However, the repository itself includes changelog-style entries and a large botocore model update set, indicating multiple API additions and documentation changes across AWS services.
1.43.19
2026-06-01Release 1.43.19 primarily updates the botocore service models for Cognito IDP, AWS Marketplace Agreement, and Amazon QuickSight. The diff shows large, mostly additive changes that introduce new API operations and new request/response shapes, alongside a botocore version bump.
Features1.43.18
2026-05-29Version 1.43.18 updates multiple AWS service models in botocore, adding new API capabilities across Bedrock (automated reasoning workflows, secret-reference credential configuration), Ground Station (Alpha-5 TLE support), Omics (engineSettings and Nextflow profiles), QuickSight (OAuthClientApplication support), RDS Data (null elements in ExecuteStatement arrays), Route53 Resolver (batch firewall rule operations), and SESV2 (tenant suppression lists). It also documents an opt-in retry behavior change via the AWS_NEW_RETRIES_2026 environment variable.
Features1.43.17
2026-05-28botocore 1.43.17 updates service model definitions across many AWS APIs (26 files, net +7852 lines). The GitHub release notes content is missing in the provided input, so the assessment below relies entirely on what the code diff actually changed in the SDK model. Notable areas include AppStream WorkSpaces Applications BYOL, Bedrock AgentCore Harness configuration, and contract/validation changes such as S3 StorageLens minimum values and botocore sensitivity masking behavior.
1.43.16
2026-05-27This release (1.43.16) has no publisher-provided release notes. The code diff shows multiple AWS service model updates in botocore, adding new API capabilities primarily related to smart subtitles/captions, Bedrock Data Automation fallbacks, and ECS Neuron device resource support.
1.43.15
2026-05-26No publisher release notes were provided for version 1.43.15. The code diff indicates this release is primarily a botocore model update that adds new API operations and new response fields, with no obvious removals or breaking signature changes visible in the provided diff.
Features1.43.14
2026-05-22Release 1.43.14 has no publisher release notes provided, but the repository changelog documents multiple service model additions (DataZone VPC connections, EC2 EnclaveOptions in ModifyInstanceAttribute, Invoicing idempotency via ClientToken, Pi performance analysis recommendations, Q Connect guardrail results, SecurityAgent verification scripts) and an S3 endpoint caching improvement. The code diff also includes additional EC2 request shape and endpoint-table changes that are not called out in the changelog.
Features1.43.13
2026-05-21Release 1.43.13 is a botocore model update that bumps botocore version to 1.43.13 and adds multiple new service API operations across several AWS services. The provided release notes contain no publisher notes, so the changelog content shown in the repo and the service model diffs represent the only evidence of what changed.
Features1.43.12
2026-05-20botocore 1.43.12 updates multiple AWS service models and endpoint metadata. The bundled changelog focuses on new API capabilities (Bedrock request metadata, Customer Profiles retraining controls and schema additions, KMS grant support for service principals), but the code diff also shows additional endpoint and model documentation changes beyond what is explicitly called out.
Features1.43.11
2026-05-19No publisher release notes were provided for version 1.43.11. The repo changelog (and .changes/1.43.11.json) documents several API model updates across Bedrock Agent Core, DevOps Agent, Amazon Managed Grafana, GuardDuty, RTBFabric, and SageMaker.
Features1.43.10
2026-05-18botocore 1.43.10 introduces several new API model updates across multiple AWS services, reflected in the changelog (accessanalyzer, connect, ec2, ecs, evs, ivs, quicksight). The publisher release notes were not provided, so the only documented changes are the entries in CHANGELOG.rst and .changes/1.43.10.json.
Features