Overcast is alpha — behaviour and APIs may change between releases. Pin your version and read the changelog before upgrading.

overcast local AWS emulator

EventBridge operations

Every EventBridge operation Overcast declares — 20 of 31 implemented — with status, behaviour notes and a link to the AWS API reference for each.

20 of 31 listed operations are implemented. Back to EventBridge.

Summary

Category	✅ Supported	❌ Unsupported
Event buses	6
Rules	7
Targets	3
Events	1
Tags	3
Archives		4
Replays		3
Connections		4

Endpoints

Event buses

Operation	Status	Notes	AWS Docs
`CreateEventBus`	✅ Supported	Creates a custom event bus; stores Description, DeadLetterConfig and KmsKeyIdentifier	docs
`DescribeEventBus`	✅ Supported	Returns bus details including Description, DeadLetterConfig, KmsKeyIdentifier and the Policy built from PutPermission grants; synthetic default bus	docs
`ListEventBuses`	✅ Supported	Always includes default bus	docs
`DeleteEventBus`	✅ Supported		docs
`PutPermission`	✅ Supported	Stores a resource policy statement on the bus (or replaces it wholesale via the Policy parameter), returned by DescribeEventBus as Policy; stored, not enforced, the same as the rest of Overcast’s IAM policies	docs
`RemovePermission`	✅ Supported	Removes one statement by StatementId, or the whole policy with RemoveAllPermissions	docs

Rules

Operation	Status	Notes	AWS Docs
`PutRule`	✅ Supported	Creates or updates a rule; refuses a rule with neither EventPattern nor ScheduleExpression, an unknown event bus, and an event pattern that is malformed or uses cidr, wildcard or $or	docs
`DescribeRule`	✅ Supported		docs
`ListRules`	✅ Supported	Lists rules for a bus	docs
`EnableRule`	✅ Supported	Sets rule state to ENABLED	docs
`DisableRule`	✅ Supported	Sets rule state to DISABLED	docs
`DeleteRule`	✅ Supported	Refuses a rule that still has targets, as AWS does; Force is the managed-rule escape only and does not bypass that	docs
`TestEventPattern`	✅ Supported	Evaluates an event against a pattern with the matcher rule delivery uses; malformed patterns and the cidr, wildcard and $or match types are InvalidEventPatternException, mandatory envelope fields are not enforced	docs

Targets

Operation	Status	Notes	AWS Docs
`PutTargets`	✅ Supported	Adds Lambda, SQS, SNS, Step Functions, Kinesis, Firehose, ECS and event-bus targets; rejects other target types at add time	docs
`ListTargetsByRule`	✅ Supported	Lists targets including input transformers and ECS/Kinesis/SQS target parameters	docs
`RemoveTargets`	✅ Supported	Removes targets from a rule	docs

Events

Operation	Status	Notes	AWS Docs
`PutEvents`	✅ Supported	Delivers matching rules to Lambda, SQS, SNS, Step Functions, Kinesis, Firehose, ECS and event-bus targets, applying InputPath/InputTransformer and RetryPolicy/DLQ; patterns match on exact values plus prefix, suffix, exists, equals-ignore-case, numeric and anything-but	docs

Tags

Operation	Status	Notes	AWS Docs
`TagResource`	✅ Supported	Tag buses and rules	docs
`ListTagsForResource`	✅ Supported	List tags for a resource	docs
`UntagResource`	✅ Supported	Removes tags from a resource	docs

Archives

Operation	Status	Notes	AWS Docs
`CreateArchive`	❌ Unsupported	Returns 501	docs
`DescribeArchive`	❌ Unsupported	Returns 501	docs
`ListArchives`	❌ Unsupported	Returns 501	docs
`DeleteArchive`	❌ Unsupported	Returns 501	docs

Replays

Operation	Status	Notes	AWS Docs
`StartReplay`	❌ Unsupported	Returns 501	docs
`DescribeReplay`	❌ Unsupported	Returns 501	docs
`ListReplays`	❌ Unsupported	Returns 501	docs

Connections

Operation	Status	Notes	AWS Docs
`CreateConnection`	❌ Unsupported	Returns 501	docs
`DescribeConnection`	❌ Unsupported	Returns 501	docs
`ListConnections`	❌ Unsupported	Returns 501	docs
`DeleteConnection`	❌ Unsupported	Returns 501	docs

EventBridge — quick start, what works, and the differences from AWS
All service pages