ListFunctions - AWS Lambda


Returns a list of Lambda functions, with the version-specific configuration of each. Lambda returns up to 50 functions per call.

Set FunctionVersion to ALL to include all published versions of each function in addition to the unpublished version.


The ListFunctions operation returns a subset of the FunctionConfiguration fields. To get the additional fields (State, StateReasonCode, StateReason, LastUpdateStatus, LastUpdateStatusReason, LastUpdateStatusReasonCode, RuntimeVersionConfig) for a function or version, use GetFunction.

Request Syntax

GET /2015-03-31/functions/?FunctionVersion=FunctionVersion&Marker=Marker&MasterRegion=MasterRegion&MaxItems=MaxItems HTTP/1.1

URI Request Parameters

The request uses the following URI parameters.


Set to ALL to include entries for all published versions of each function.

Valid Values: ALL


Specify the pagination token that's returned by a previous request to retrieve the next page of results.


For Lambda@Edge functions, the AWS Region of the master function. For example, us-east-1 filters the list of functions to include only Lambda@Edge functions replicated from a master function in US East (N. Virginia). If specified, you must set FunctionVersion to ALL.

Pattern: ALL|[a-z]{2}(-gov)?-[a-z]+-\d{1}


The maximum number of functions to return in the response. Note that ListFunctions returns a maximum of 50 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 { "Functions": [ { "Architectures": [ "string" ], "CodeSha256": "string", "CodeSize": number, "DeadLetterConfig": { "TargetArn": "string" }, "Description": "string", "Environment": { "Error": { "ErrorCode": "string", "Message": "string" }, "Variables": { "string" : "string" } }, "EphemeralStorage": { "Size": number }, "FileSystemConfigs": [ { "Arn": "string", "LocalMountPath": "string" } ], "FunctionArn": "string", "FunctionName": "string", "Handler": "string", "ImageConfigResponse": { "Error": { "ErrorCode": "string", "Message": "string" }, "ImageConfig": { "Command": [ "string" ], "EntryPoint": [ "string" ], "WorkingDirectory": "string" } }, "KMSKeyArn": "string", "LastModified": "string", "LastUpdateStatus": "string", "LastUpdateStatusReason": "string", "LastUpdateStatusReasonCode": "string", "Layers": [ { "Arn": "string", "CodeSize": number, "SigningJobArn": "string", "SigningProfileVersionArn": "string" } ], "LoggingConfig": { "ApplicationLogLevel": "string", "LogFormat": "string", "LogGroup": "string", "SystemLogLevel": "string" }, "MasterArn": "string", "MemorySize": number, "PackageType": "string", "RevisionId": "string", "Role": "string", "Runtime": "string", "RuntimeVersionConfig": { "Error": { "ErrorCode": "string", "Message": "string" }, "RuntimeVersionArn": "string" }, "SigningJobArn": "string", "SigningProfileVersionArn": "string", "SnapStart": { "ApplyOn": "string", "OptimizationStatus": "string" }, "State": "string", "StateReason": "string", "StateReasonCode": "string", "Timeout": number, "TracingConfig": { "Mode": "string" }, "Version": "string", "VpcConfig": { "Ipv6AllowedForDualStack": boolean, "SecurityGroupIds": [ "string" ], "SubnetIds": [ "string" ], "VpcId": "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 Lambda functions.

Type: Array of FunctionConfiguration objects


The pagination token that's included if more results are available.

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 AWS 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 AWS SDKs, see the following: