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: Yes, the repo shows continuous activity, with an upstream push as recent as 2026-07-29 and multiple updates to botocore versions in the last week.
- Update cadence: Appears frequent and steady, roughly every 1 to 2 days in late July 2026 (versions 1.43.49 through 1.43.58 span about 13 days).
AI summary generated
Recent updates
1.43.62
botocore version is bumped to 1.43.62 and the release primarily consists of additive AWS service model updates (new shapes, request/response fields, enum extensions) across multiple services. There are several notable schema and validation model changes, especially for CloudWatch Logs lookup tables and Amazon Bedrock Converse mid-conversation tool handling.
Features1.43.61
Version 1.43.61 updates botocore service models and configuration for BCM Pricing Calculator and BCM Recommended Actions. The most notable code change removes Smithy RPC v2 CBOR protocol support for those services, and adjusts parts of their error metadata in the service models.
Features1.43.60
This release (1.43.60) updates the bundled botocore service models and includes a new PricingPlanManager API surface, plus multiple service-specific API augmentations (Bedrock evaluator model configuration, MSK Express channel operations, Lambda runtime support, etc.). No publisher release notes were provided, so the code diff is the authoritative source for what changed.
Features1.43.59
botocore version 1.43.59 updates service models and documentation. The only functional changes evident in the diff are additive API model additions across DMS, EC2, GameLift Streams, Glue, IoT SiteWise, and WAFv2, plus a botocore version bump and some docs/paginator updates.
Features1.43.58
Version 1.43.58 is primarily a botocore service model update (data files) plus a SDK version bump from 1.43.57 to 1.43.58. The code diff adds new API modeling and authentication/parameter schema capabilities, most notably for Bedrock AgentCore identity (Private Key JWT), and adds a new Trusted Advisor operation (ListRecommendationsForResource). No release notes were provided by the publisher for this release.
Features1.43.57
botocore version is bumped from 1.43.56 to 1.43.57 and the underlying service model data is updated across multiple AWS services. The repository introduces several new API operations and request/response shapes, including account primary email update status, additional export formats, new Clean Rooms worker type, EMR on EKS virtual cluster update support, Glue batch evaluation run retrieval, QuickSight custom permissions governance, SageMaker inference optimization LoRA adapter support, and Security Agent task hours reporting. No publisher release notes were provided for 1.43.57, so the code changes are not documented there.
Features1.43.56
No publisher release notes were provided for 1.43.56. The changelog-style entries and the code diff show a mix of new API operations, protocol handling updates for Application Insights, endpoint configuration updates, and at least one client-visible breaking schema change (removal of a response field).
1.43.55
Release 1.43.55 updates multiple service models and client protocol support. It introduces Smithy RPC v2 CBOR as an additional protocol (with the SDK prioritizing the most performant protocol) for several services, plus new API shapes and operations for services like Bedrock AgentCore, DataZone notebook sync, GameLift Streams, and MediaPackageV2.
Features1.43.54
No publisher release notes were provided for version 1.43.54. The repository changelog and .changes manifest describe multiple AWS API model updates (new operations, new shapes, and documentation updates) plus a TLS-related behavior change in botocore. The code diff also shows stricter CloudWatch scheduled query configuration validation that is not fully covered by the described changelog items.
Features1.43.53
botocore 1.43.53 adds new API operations across multiple AWS services (notably EMR on EKS, Invoicing, Redshift, and Timestream for InfluxDB), and expands some request/response models with new fields. It also introduces a response shape breaking change in Amazon Inspector2 by removing the Tags field from specific list response objects. No separate publisher release notes were provided, so the changelog entries in this diff are the main documented material.
BreakingFeatures1.43.52
Release 1.43.52 contains model updates across multiple AWS services in the botocore codebase, including new API operations and newly exposed request/response fields. No publisher release notes were provided, so all observed changes from the code diff should be treated as effectively undocumented for consumers.
1.43.51
botocore 1.43.51 updates service model definitions for several AWS APIs, including new options for Amazon Cognito (SMS via AWS End User Messaging), Amazon GameLift Streams (IAM role per stream session), Amazon Managed Service for Apache Flink (Flink 2.3), Autonomous Database (customer-managed Secrets Manager password sources), and Amazon RDS (AssociatedRoles). The release also bumps the bundled AWS CRT dependency to awscrt 0.36.0 and updates endpoint metadata for additional regions/partitions.
Features1.43.50
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.
Features