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PyPI · #17 most downloaded on PyPI
Low-level, data-driven core of boto 3.
Last release 4 days ago
02 Oct 2026
Ships on a steady schedule
a new release about every 8 days
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
14 years old
2530 releases · first in 2012
api-change:rds: Update rds client to latest version
api-change:rds: Update rds client to latest version
api-change:ds: Update ds client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:cloudwatch: Update cloudwatch client to latest version
api-change:cloudwatch: Update cloudwatch client to latest version
api-change:s3: Update s3 client to latest version
api-change:organizations: Update organizations client to latest version
One column per quarter.
bugfix:Serialization: Fixes #1557 __. Fixed a regression in serialization where request bodies would be improperly encoded.
bugfix:Serialization: Fixes #1557. Fixed a regression in serialization where request bodies would be improperly encoded.
api-change:es: Update es client to latest version
api-change:rekognition: Update rekognition client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:elastictranscoder: Update elastictranscoder client to latest version
api-change:ecs: Update ecs client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:cloudwatch: Update cloudwatch client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:elasticache: Update elasticache client to latest version
enhancement:s3: Adds encoding and decoding handlers for ListObjectsV2 #1552 __
enhancement:s3: Adds encoding and decoding handlers for ListObjectsV2 #1552
api-change:polly: Update polly client to latest version
api-change:ses: Update ses client to latest version
api-change:ses: Update ses client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:fms: Update fms client to latest version
api-change:connect: Update connect client to latest version
api-change:opsworkscm: Update opsworkscm client to latest version
api-change:opsworkscm: Update opsworkscm client to latest version
api-change:ssm: Update ssm client to latest version
api-change:redshift: Update redshift client to latest version
api-change:redshift: Update redshift client to latest version
api-change:cloudhsmv2: Update cloudhsmv2 client to latest version
api-change:logs: Update logs client to latest version
api-change:logs: Update logs client to latest version
api-change:config: Update config client to latest version
feature:Events: This migrates the event system to using sevice ids instead of either client name or endpoint prefix. This prevents issues that might arise when a service changes their endpoint prefix, also fixes a long-standing bug where you could not register an event to a particular service if it happened to share its endpoint prefix with another service (e.g. autoscaling and application-autoscaling both use the endpoint prefix autoscaling). Please see the upgrade notes to determine if you are impacted and how to proceed if you are.
api-change:apigateway: Update apigateway client to latest version
api-change:apigateway: Update apigateway client to latest version
api-change:codecommit: Update codecommit client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:rds: Update rds client to latest version
api-change:rds: Update rds client to latest version
api-change:s3: Update s3 client to latest version
api-change:appstream: Update appstream client to latest version
api-change:dynamodb: Update dynamodb client to latest version
api-change:elb: Update elb client to latest version
api-change:rds: Update rds client to latest version
api-change:rds: Update rds client to latest version
api-change:rekognition: Update rekognition client to latest version
api-change:waf-regional: Update waf-regional client to latest version
api-change:waf-regional: Update waf-regional client to latest version
api-change:waf: Update waf client to latest version
api-change:eks: Update eks client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:sagemaker: Update sagemaker client to latest version
bugfix:signing: Fix an issue where mixed endpoint casing could cause a SigV4 signature mismatch.
api-change:glue: Update glue client to latest version
api-change:glue: Update glue client to latest version
api-change:sagemaker-runtime: Update sagemaker-runtime client to latest version
api-change:mediapackage: Update mediapackage client to latest version
api-change:glue: Update glue client to latest version
api-change:glue: Update glue client to latest version
api-change:xray: Update xray client to latest version
api-change:iot: Update iot client to latest version
api-change:iot: Update iot client to latest version
api-change:signer: Update signer client to latest version
api-change:redshift: Update redshift client to latest version
api-change:iotanalytics: Update iotanalytics client to latest version
api-change:glue: Update glue client to latest version
api-change:glue: Update glue client to latest version
api-change:events: Update events client to latest version
api-change:events: Update events client to latest version
api-change:cognito-idp: Update cognito-idp client to latest version
feature:urllib3: The vendored version of requests and urllib3 are no longer being used and botocore now has a direct dependency on newer versions of upstream urllib3.
api-change:iot: Update iot client to latest version
api-change:iot: Update iot client to latest version
api-change:rekognition: Update rekognition client to latest version
api-change:lex-models: Update lex-models client to latest version
api-change:iotanalytics: Update iotanalytics client to latest version
api-change:medialive: Update medialive client to latest version
api-change:snowball: Update snowball client to latest version
api-change:snowball: Update snowball client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:dlm: Update dlm client to latest version
api-change:rds: Update rds client to latest version
api-change:elasticbeanstalk: Update elasticbeanstalk client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:dynamodb: Update dynamodb client to latest version
api-change:dax: Update dax client to latest version
api-change:dax: Update dax client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:discovery: Update discovery client to latest version
api-change:discovery: Update discovery client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:redshift: Update redshift client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:devicefarm: Update devicefarm client to latest version
api-change:devicefarm: Update devicefarm client to latest version
api-change:es: Update es client to latest version
api-change:es: Update es client to latest version
api-change:autoscaling: Update autoscaling client to latest version
api-change:cloudfront: Update cloudfront client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:rds: Update rds client to latest version
api-change:rds: Update rds client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:rds: Update rds client to latest version
api-change:rds: Update rds client to latest version
api-change:dax: Update dax client to latest version
api-change:ecs: Update ecs client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:ssm: Update ssm client to latest version
api-change:logs: Update logs client to latest version
api-change:logs: Update logs client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:pinpoint: Update pinpoint client to latest version
api-change:health: Update health client to latest version
api-change:health: Update health client to latest version
api-change:dynamodb: Update dynamodb client to latest version
api-change:alexaforbusiness: Update alexaforbusiness client to latest version
api-change:alexaforbusiness: Update alexaforbusiness client to latest version
api-change:polly: Update polly client to latest version
api-change:polly: Update polly client to latest version
api-change:ssm: Update ssm client to latest version
api-change:kinesis: Update kinesis client to latest version
api-change:resource-groups: Update resource-groups client to latest version
api-change:storagegateway: Update storagegateway client to latest version
api-change:storagegateway: Update storagegateway client to latest version
api-change:transcribe: Update transcribe client to latest version
api-change:kms: Update kms client to latest version
api-change:kms: Update kms client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:es: Update es client to latest version
api-change:iot: Update iot client to latest version
api-change:connect: Update connect client to latest version
api-change:directconnect: Update directconnect client to latest version
api-change:directconnect: Update directconnect client to latest version
api-change:glue: Update glue client to latest version
api-change:iot: Update iot client to latest version
api-change:cloudhsmv2: Update cloudhsmv2 client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:mq: Update mq client to latest version
enhancment:Timestamp Serialization: Support explicit timestamp serialization per timestamp shape.
api-change:glacier: Update glacier client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:greengrass: Update greengrass client to latest version
api-change:inspector: Update inspector client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:redshift: Update redshift client to latest version
api-change:ecs: Update ecs client to latest version
api-change:ecs: Update ecs client to latest version
api-change:elbv2: Update elbv2 client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:dynamodb: Update dynamodb client to latest version
api-change:dynamodb: Update dynamodb client to latest version
api-change:config: Update config client to latest version
api-change:config: Update config client to latest version
api-change:dlm: Update dlm client to latest version
api-change:mediapackage: Update mediapackage client to latest version
api-change:mediapackage: Update mediapackage client to latest version
api-change:iotanalytics: Update iotanalytics client to latest version
api-change:iotanalytics: Update iotanalytics client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:polly: Update polly client to latest version
api-change:comprehend: Update comprehend client to latest version
api-change:snowball: Update snowball client to latest version
api-change:kinesisvideo: Update kinesisvideo client to latest version
api-change:kinesisvideo: Update kinesisvideo client to latest version
api-change:appstream: Update appstream client to latest version
api-change:kinesis-video-archived-media: Update kinesis-video-archived-media client to latest version
api-change:iam: Update iam client to latest version
api-change:iam: Update iam client to latest version
api-change:dlm: Update dlm client to latest version
api-change:appsync: Update appsync client to latest version
api-change:efs: Update efs client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:emr: Update emr client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ssm: Update ssm client to latest version
api-change:s3: Update s3 client to latest version
api-change:apigateway: Update apigateway client to latest version
api-change:ce: Update ce client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:codebuild: Update codebuild client to latest version
api-change:glue: Update glue client to latest version
api-change:opsworks: Update opsworks client to latest version
api-change:appstream: Update appstream client to latest version
api-change:application-autoscaling: Update application-autoscaling client to latest version
api-change:application-autoscaling: Update application-autoscaling client to latest version
api-change:application-autoscaling: Update application-autoscaling client to latest version
api-change:application-autoscaling: Update application-autoscaling client to latest version
api-change:lambda: Update lambda client to latest version
api-change:dms: Update dms client to latest version
api-change:ce: Update ce client to latest version
api-change:transcribe: Update transcribe client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:mediaconvert: Update mediaconvert client to latest version
api-change:serverlessrepo: Update serverlessrepo client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:sagemaker: Update sagemaker client to latest version
api-change:pinpoint: Update pinpoint client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:ec2: Update ec2 client to latest version
api-change:redshift: Update redshift client to latest version
api-change:acm: Update acm client to latest version
api-change:ssm: Update ssm client to latest version
api-change:ssm: Update ssm client to latest version
api-change:elasticbeanstalk: Update elasticbeanstalk client to latest version
api-change:elasticbeanstalk: Update elasticbeanstalk client to latest version
api-change:storagegateway: Update storagegateway client to latest version
api-change:lambda: Update lambda client to latest version
api-change:cloudfront: Update cloudfront client to latest version
api-change:cloudfront: Update cloudfront client to latest version
api-change:comprehend: Update comprehend client to latest version
api-change:codepipeline: Update codepipeline client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
enhancement:StreamingResponses: Add iter_lines() and iter_chunks() to streaming responses (#1195)
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:secretsmanager: Update secretsmanager client to latest version
api-change:s3: Update s3 client to latest version
api-change:inspector: Update inspector client to latest version
api-change:appstream: Update appstream client to latest version
api-change:appstream: Update appstream client to latest version
api-change:alexaforbusiness: Update alexaforbusiness client to latest version
api-change:clouddirectory: Update clouddirectory client to latest version
api-change:clouddirectory: Update clouddirectory client to latest version
Your coding agent can read these notes before it upgrades. Set up the MCP server →