ListEventSourceMappings - Amazon Lambda
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Lists event source mappings. Specify an EventSourceArn to show only event source mappings for a single event source.

Request Syntax

GET /2015-03-31/event-source-mappings/?EventSourceArn=EventSourceArn&FunctionName=FunctionName&Marker=Marker&MaxItems=MaxItems HTTP/1.1

URI Request Parameters

The request uses the following URI parameters.


The Amazon Resource Name (ARN) of the event source.

  • Amazon Kinesis – The ARN of the data stream or a stream consumer.

  • Amazon DynamoDB Streams – The ARN of the stream.

  • Amazon Simple Queue Service – The ARN of the queue.

  • Amazon Managed Streaming for Apache Kafka – The ARN of the cluster or the ARN of the VPC connection (for cross-account event source mappings).

  • Amazon MQ – The ARN of the broker.

  • Amazon DocumentDB – The ARN of the DocumentDB change stream.

Pattern: arn:(aws[a-zA-Z0-9-]*):([a-zA-Z0-9\-])+:([a-z]{2}(-gov)?-[a-z]+-\d{1})?:(\d{12})?:(.*)


The name or ARN of the Lambda function.

Name formats
  • Function nameMyFunction.

  • Function ARNarn:aws:lambda:us-west-2:123456789012:function:MyFunction.

  • Version or Alias ARNarn:aws:lambda:us-west-2:123456789012:function:MyFunction:PROD.

  • Partial ARN123456789012:function:MyFunction.

The length constraint applies only to the full ARN. If you specify only the function name, it's limited to 64 characters in length.

Length Constraints: Minimum length of 1. Maximum length of 140.

Pattern: (arn:(aws[a-zA-Z-]*)?:lambda:)?([a-z]{2}(-gov)?-[a-z]+-\d{1}:)?(\d{12}:)?(function:)?([a-zA-Z0-9-_]+)(:(\$LATEST|[a-zA-Z0-9-_]+))?


A pagination token returned by a previous call.


The maximum number of event source mappings to return. Note that ListEventSourceMappings returns a maximum of 100 items in each response, even if you set the number higher.

Valid Range: Minimum value of 1. Maximum value of 10000.

Request Body

The request does not have a request body.

Response Syntax

HTTP/1.1 200 Content-type: application/json { "EventSourceMappings": [ { "AmazonManagedKafkaEventSourceConfig": { "ConsumerGroupId": "string" }, "BatchSize": number, "BisectBatchOnFunctionError": boolean, "DestinationConfig": { "OnFailure": { "Destination": "string" }, "OnSuccess": { "Destination": "string" } }, "DocumentDBEventSourceConfig": { "CollectionName": "string", "DatabaseName": "string", "FullDocument": "string" }, "EventSourceArn": "string", "FilterCriteria": { "Filters": [ { "Pattern": "string" } ] }, "FunctionArn": "string", "FunctionResponseTypes": [ "string" ], "LastModified": number, "LastProcessingResult": "string", "MaximumBatchingWindowInSeconds": number, "MaximumRecordAgeInSeconds": number, "MaximumRetryAttempts": number, "ParallelizationFactor": number, "Queues": [ "string" ], "ScalingConfig": { "MaximumConcurrency": number }, "SelfManagedEventSource": { "Endpoints": { "string" : [ "string" ] } }, "SelfManagedKafkaEventSourceConfig": { "ConsumerGroupId": "string" }, "SourceAccessConfigurations": [ { "Type": "string", "URI": "string" } ], "StartingPosition": "string", "StartingPositionTimestamp": number, "State": "string", "StateTransitionReason": "string", "Topics": [ "string" ], "TumblingWindowInSeconds": number, "UUID": "string" } ], "NextMarker": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.


A list of event source mappings.

Type: Array of EventSourceMappingConfiguration objects


A pagination token that's returned when the response doesn't contain all event source mappings.

Type: String


For information about the errors that are common to all actions, see Common Errors.


One of the parameters in the request is not valid.

HTTP Status Code: 400


The resource specified in the request does not exist.

HTTP Status Code: 404


The Amazon Lambda service encountered an internal error.

HTTP Status Code: 500


The request throughput limit was exceeded. For more information, see Lambda quotas.

HTTP Status Code: 429

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: