Lambda examples using Amazon CLI - Amazon Command Line Interface
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Lambda examples using Amazon CLI

The following code examples show you how to perform actions and implement common scenarios by using the Amazon Command Line Interface with Lambda.

Actions are code excerpts from larger programs and must be run in context. While actions show you how to call individual service functions, you can see actions in context in their related scenarios.

Each example includes a link to the complete source code, where you can find instructions on how to set up and run the code in context.

Topics

Actions

The following code example shows how to use add-layer-version-permission.

Amazon CLI

To add permissions to a layer version

The following add-layer-version-permission example grants permission for the specified account to use version 1 of the layer my-layer.

aws lambda add-layer-version-permission \
    --layer-name my-layer \
    --statement-id xaccount \
    --action lambda:GetLayerVersion  \
    --principal 123456789012 \
    --version-number 1

Output:

{
    "RevisionId": "35d87451-f796-4a3f-a618-95a3671b0a0c",
    "Statement":
    {
        "Sid":"xaccount",
        "Effect":"Allow",
        "Principal":{
            "AWS":"arn:aws:iam::210987654321:root"
        },
        "Action":"lambda:GetLayerVersion",
        "Resource":"arn:aws:lambda:us-east-2:123456789012:layer:my-layer:1"
    }
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use add-permission.

Amazon CLI

To add permissions to an existing Lambda function

The following add-permission example grants the Amazon SNS service permission to invoke a function named my-function.

aws lambda add-permission \
    --function-name my-function \
    --action lambda:InvokeFunction \
    --statement-id sns \
    --principal sns.amazonaws.com

Output:

{
    "Statement":
    {
        "Sid":"sns",
        "Effect":"Allow",
        "Principal":{
            "Service":"sns.amazonaws.com"
        },
        "Action":"lambda:InvokeFunction",
        "Resource":"arn:aws:lambda:us-east-2:123456789012:function:my-function"
    }
}

For more information, see Using Resource-based Policies for Amazon Lambda in the Amazon Lambda Developer Guide.

  • For API details, see AddPermission in Amazon CLI Command Reference.

The following code example shows how to use create-alias.

Amazon CLI

To create an alias for a Lambda function

The following create-alias example creates an alias named LIVE that points to version 1 of the my-function Lambda function.

aws lambda create-alias \
    --function-name my-function \
    --description "alias for live version of function" \
    --function-version 1 \
    --name LIVE

Output:

{
    "FunctionVersion": "1",
    "Name": "LIVE",
    "AliasArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:LIVE",
    "RevisionId": "873282ed-4cd3-4dc8-a069-d0c647e470c6",
    "Description": "alias for live version of function"
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see CreateAlias in Amazon CLI Command Reference.

The following code example shows how to use create-event-source-mapping.

Amazon CLI

To create a mapping between an event source and an Amazon Lambda function

The following create-event-source-mapping example creates a mapping between an SQS queue and the my-function Lambda function.

aws lambda create-event-source-mapping \
    --function-name my-function \
    --batch-size 5 \
    --event-source-arn arn:aws:sqs:us-west-2:123456789012:mySQSqueue

Output:

{
    "UUID": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "StateTransitionReason": "USER_INITIATED",
    "LastModified": 1569284520.333,
    "BatchSize": 5,
    "State": "Creating",
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "EventSourceArn": "arn:aws:sqs:us-west-2:123456789012:mySQSqueue"
}

For more information, see Amazon Lambda Event Source Mapping in the Amazon Lambda Developer Guide.

The following code example shows how to use create-function.

Amazon CLI

To create a Lambda function

The following create-function example creates a Lambda function named my-function.

aws lambda create-function \
    --function-name my-function \
    --runtime nodejs22.x \
    --zip-file fileb://my-function.zip \
    --handler my-function.handler \
    --role arn:aws:iam::123456789012:role/service-role/MyTestFunction-role-tges6bf4

Contents of my-function.zip:

This file is a deployment package that contains your function code and any dependencies.

Output:

{
    "TracingConfig": {
        "Mode": "PassThrough"
    },
    "CodeSha256": "PFn4S+er27qk+UuZSTKEQfNKG/XNn7QJs90mJgq6oH8=",
    "FunctionName": "my-function",
    "CodeSize": 308,
    "RevisionId": "873282ed-4cd3-4dc8-a069-d0c647e470c6",
    "MemorySize": 128,
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "Version": "$LATEST",
    "Role": "arn:aws:iam::123456789012:role/service-role/MyTestFunction-role-zgur6bf4",
    "Timeout": 3,
    "LastModified": "2025-10-14T22:26:11.234+0000",
    "Handler": "my-function.handler",
    "Runtime": "nodejs22.x",
    "Description": ""
}

For more information, see Configure Lambda function memory in the Amazon Lambda Developer Guide.

  • For API details, see CreateFunction in Amazon CLI Command Reference.

The following code example shows how to use delete-alias.

Amazon CLI

To delete an alias of a Lambda function

The following delete-alias example deletes the alias named LIVE from the my-function Lambda function.

aws lambda delete-alias \
    --function-name my-function \
    --name LIVE

This command produces no output.

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see DeleteAlias in Amazon CLI Command Reference.

The following code example shows how to use delete-event-source-mapping.

Amazon CLI

To delete the mapping between an event source and an Amazon Lambda function

The following delete-event-source-mapping example deletes the mapping between an SQS queue and the my-function Lambda function.

aws lambda delete-event-source-mapping \
    --uuid  a1b2c3d4-5678-90ab-cdef-11111EXAMPLE

Output:

{
    "UUID": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "StateTransitionReason": "USER_INITIATED",
    "LastModified": 1569285870.271,
    "BatchSize": 5,
    "State": "Deleting",
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "EventSourceArn": "arn:aws:sqs:us-west-2:123456789012:mySQSqueue"
}

For more information, see Amazon Lambda Event Source Mapping in the Amazon Lambda Developer Guide.

The following code example shows how to use delete-function-concurrency.

Amazon CLI

To remove the reserved concurrent execution limit from a function

The following delete-function-concurrency example deletes the reserved concurrent execution limit from the my-function function.

aws lambda delete-function-concurrency \
    --function-name  my-function

This command produces no output.

For more information, see Reserving Concurrency for a Lambda Function in the Amazon Lambda Developer Guide.

The following code example shows how to use delete-function-event-invoke-config.

Amazon CLI

To delete an asynchronous invocation configuration

The following delete-function-event-invoke-config example deletes the asynchronous invocation configuration for the GREEN alias of the specified function.

aws lambda delete-function-event-invoke-config --function-name my-function:GREEN

The following code example shows how to use delete-function.

Amazon CLI

Example 1: To delete a Lambda function by function name

The following delete-function example deletes the Lambda function named my-function by specifying the function's name.

aws lambda delete-function \
    --function-name my-function

This command produces no output.

Example 2: To delete a Lambda function by function ARN

The following delete-function example deletes the Lambda function named my-function by specifying the function's ARN.

aws lambda delete-function \
    --function-name arn:aws:lambda:us-west-2:123456789012:function:my-function

This command produces no output.

Example 3: To delete a Lambda function by partial function ARN

The following delete-function example deletes the Lambda function named my-function by specifying the function's partial ARN.

aws lambda delete-function \
    --function-name 123456789012:function:my-function

This command produces no output.

For more information, see Amazon Lambda Function Configuration in the Amazon Lambda Developer Guide.

  • For API details, see DeleteFunction in Amazon CLI Command Reference.

The following code example shows how to use delete-layer-version.

Amazon CLI

To delete a version of a Lambda layer

The following delete-layer-version example deletes version 2 of the layer named my-layer.

aws lambda delete-layer-version \
    --layer-name my-layer \
    --version-number 2

This command produces no output.

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use delete-provisioned-concurrency-config.

Amazon CLI

To delete a provisioned concurrency configuration

The following delete-provisioned-concurrency-config example deletes the provisioned concurrency configuration for the GREEN alias of the specified function.

aws lambda delete-provisioned-concurrency-config \
    --function-name my-function \
    --qualifier GREEN

The following code example shows how to use get-account-settings.

Amazon CLI

To retrieve details about your account in an Amazon Region

The following get-account-settings example displays the Lambda limits and usage information for your account.

aws lambda get-account-settings

Output:

{
    "AccountLimit": {
       "CodeSizeUnzipped": 262144000,
       "UnreservedConcurrentExecutions": 1000,
       "ConcurrentExecutions": 1000,
       "CodeSizeZipped": 52428800,
       "TotalCodeSize": 80530636800
    },
    "AccountUsage": {
       "FunctionCount": 4,
       "TotalCodeSize": 9426
    }
}

For more information, see Amazon Lambda Limits in the Amazon Lambda Developer Guide.

The following code example shows how to use get-alias.

Amazon CLI

To retrieve details about a function alias

The following get-alias example displays details for the alias named LIVE on the my-function Lambda function.

aws lambda get-alias \
    --function-name my-function \
    --name LIVE

Output:

{
    "FunctionVersion": "3",
    "Name": "LIVE",
    "AliasArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:LIVE",
    "RevisionId": "594f41fb-b85f-4c20-95c7-6ca5f2a92c93",
    "Description": "alias for live version of function"
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see GetAlias in Amazon CLI Command Reference.

The following code example shows how to use get-event-source-mapping.

Amazon CLI

To retrieve details about an event source mapping

The following get-event-source-mapping example displays the details for the mapping between an SQS queue and the my-function Lambda function.

aws lambda get-event-source-mapping \
    --uuid "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE"

Output:

{
    "UUID": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "StateTransitionReason": "USER_INITIATED",
    "LastModified": 1569284520.333,
    "BatchSize": 5,
    "State": "Enabled",
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "EventSourceArn": "arn:aws:sqs:us-west-2:123456789012:mySQSqueue"
}

For more information, see Amazon Lambda Event Source Mapping in the Amazon Lambda Developer Guide.

The following code example shows how to use get-function-concurrency.

Amazon CLI

To view the reserved concurrency setting for a function

The following get-function-concurrency example retrieves the reserved concurrency setting for the specified function.

aws lambda get-function-concurrency \
    --function-name my-function

Output:

{
    "ReservedConcurrentExecutions": 250
}

The following code example shows how to use get-function-configuration.

Amazon CLI

To retrieve the version-specific settings of a Lambda function

The following get-function-configuration example displays the settings for version 2 of the my-function function.

aws lambda get-function-configuration \
    --function-name  my-function:2

Output:

{
    "FunctionName": "my-function",
    "LastModified": "2019-09-26T20:28:40.438+0000",
    "RevisionId": "e52502d4-9320-4688-9cd6-152a6ab7490d",
    "MemorySize": 256,
    "Version": "2",
    "Role": "arn:aws:iam::123456789012:role/service-role/my-function-role-uy3l9qyq",
    "Timeout": 3,
    "Runtime": "nodejs10.x",
    "TracingConfig": {
        "Mode": "PassThrough"
    },
    "CodeSha256": "5tT2qgzYUHaqwR716pZ2dpkn/0J1FrzJmlKidWoaCgk=",
    "Description": "",
    "VpcConfig": {
        "SubnetIds": [],
        "VpcId": "",
        "SecurityGroupIds": []
    },
    "CodeSize": 304,
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:2",
    "Handler": "index.handler"
}

For more information, see Amazon Lambda Function Configuration in the Amazon Lambda Developer Guide.

The following code example shows how to use get-function-event-invoke-config.

Amazon CLI

To view an asynchronous invocation configuration

The following get-function-event-invoke-config example retrieves the asynchronous invocation configuration for the BLUE alias of the specified function.

aws lambda get-function-event-invoke-config \
    --function-name my-function:BLUE

Output:

{
    "LastModified": 1577824396.653,
    "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:BLUE",
    "MaximumRetryAttempts": 0,
    "MaximumEventAgeInSeconds": 3600,
    "DestinationConfig": {
        "OnSuccess": {},
        "OnFailure": {
            "Destination": "arn:aws:sqs:us-east-2:123456789012:failed-invocations"
        }
    }
}

The following code example shows how to use get-function.

Amazon CLI

To retrieve information about a function

The following get-function example displays information about the my-function function.

aws lambda get-function \
    --function-name  my-function

Output:

{
    "Concurrency": {
        "ReservedConcurrentExecutions": 100
    },
    "Code": {
        "RepositoryType": "S3",
        "Location": "https://awslambda-us-west-2-tasks.s3.us-west-2.amazonaws.com/snapshots/123456789012/my-function..."
    },
    "Configuration": {
        "TracingConfig": {
            "Mode": "PassThrough"
        },
        "Version": "$LATEST",
        "CodeSha256": "5tT2qgzYUHoqwR616pZ2dpkn/0J1FrzJmlKidWaaCgk=",
        "FunctionName": "my-function",
        "VpcConfig": {
            "SubnetIds": [],
            "VpcId": "",
            "SecurityGroupIds": []
        },
        "MemorySize": 128,
        "RevisionId": "28f0fb31-5c5c-43d3-8955-03e76c5c1075",
        "CodeSize": 304,
        "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
        "Handler": "index.handler",
        "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
        "Timeout": 3,
        "LastModified": "2025-09-24T18:20:35.054+0000",
        "Runtime": "nodejs22.x",
        "Description": ""
    }
}

For more information, see Configure Lambda function memory in the Amazon Lambda Developer Guide.

  • For API details, see GetFunction in Amazon CLI Command Reference.

The following code example shows how to use get-layer-version-by-arn.

Amazon CLI

To retrieve information about a Lambda layer version

The following get-layer-version-by-arn example displays information about the layer version with the specified Amazon Resource Name (ARN).

aws lambda get-layer-version-by-arn \
    --arn "arn:aws:lambda:us-west-2:123456789012:layer:AWSLambda-Python311-SciPy1x:2"

Output:

{
    "LayerVersionArn": "arn:aws:lambda:us-west-2:123456789012:layer:AWSLambda-Python311-SciPy1x:2",
    "Description": "AWS Lambda SciPy layer for Python 3.11 (scipy-1.1.0, numpy-1.15.4) https://github.com/scipy/scipy/releases/tag/v1.1.0 https://github.com/numpy/numpy/releases/tag/v1.15.4",
    "CreatedDate": "2023-10-12T10:09:38.398+0000",
    "LayerArn": "arn:aws:lambda:us-west-2:123456789012:layer:AWSLambda-Python311-SciPy1x",
    "Content": {
        "CodeSize": 41784542,
        "CodeSha256": "GGmv8ocUw4cly0T8HL0Vx/f5V4RmSCGNjDIslY4VskM=",
        "Location": "https://awslambda-us-west-2-layers.s3.us-west-2.amazonaws.com/snapshots/123456789012/..."
    },
    "Version": 2,
    "CompatibleRuntimes": [
        "python3.11"
    ],
    "LicenseInfo": "SciPy: https://github.com/scipy/scipy/blob/main/LICENSE.txt, NumPy: https://github.com/numpy/numpy/blob/main/LICENSE.txt"
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use get-layer-version-policy.

Amazon CLI

To retrieve the permissions policy for a Lambda layer version

The following get-layer-version-policy example displays policy information about version 1 for the layer named my-layer.

aws lambda get-layer-version-policy \
    --layer-name my-layer \
    --version-number 1

Output:

{
    "Policy": {
        "Version":"2012-10-17",		 	 	 
        "Id":"default",
        "Statement":
        [
            {
                "Sid":"xaccount",
                "Effect":"Allow",
                "Principal": {"AWS":"arn:aws:iam::123456789012:root"},
                "Action":"lambda:GetLayerVersion",
                "Resource":"arn:aws:lambda:us-west-2:123456789012:layer:my-layer:1"
            }
        ]
    },
    "RevisionId": "c68f21d2-cbf0-4026-90f6-1375ee465cd0"
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use get-layer-version.

Amazon CLI

To retrieve information about a Lambda layer version

The following get-layer-version example displays information for version 1 of the layer named my-layer.

aws lambda get-layer-version \
    --layer-name my-layer \
    --version-number 1

Output:

{
    "Content": {
        "Location": "https://awslambda-us-east-2-layers.s3.us-east-2.amazonaws.com/snapshots/123456789012/my-layer-4aaa2fbb-ff77-4b0a-ad92-5b78a716a96a?versionId=27iWyA73cCAYqyH...",
        "CodeSha256": "tv9jJO+rPbXUUXuRKi7CwHzKtLDkDRJLB3cC3Z/ouXo=",
        "CodeSize": 169
    },
    "LayerArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer",
    "LayerVersionArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer:1",
    "Description": "My Python layer",
    "CreatedDate": "2018-11-14T23:03:52.894+0000",
    "Version": 1,
    "LicenseInfo": "MIT",
    "CompatibleRuntimes": [
        "python3.10",
        "python3.11"
    ]
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use get-policy.

Amazon CLI

To retrieve the resource-based IAM policy for a function, version, or alias

The following get-policy example displays policy information about the my-function Lambda function.

aws lambda get-policy \
    --function-name my-function

Output:

{
    "Policy": {
        "Version":"2012-10-17",		 	 	 
        "Id":"default",
        "Statement":
        [
            {
                "Sid":"iot-events",
                "Effect":"Allow",
                "Principal": {"Service":"iotevents.amazonaws.com"},
                "Action":"lambda:InvokeFunction",
                "Resource":"arn:aws:lambda:us-west-2:123456789012:function:my-function"
            }
        ]
    },
    "RevisionId": "93017fc9-59cb-41dc-901b-4845ce4bf668"
}

For more information, see Using Resource-based Policies for Amazon Lambda in the Amazon Lambda Developer Guide.

  • For API details, see GetPolicy in Amazon CLI Command Reference.

The following code example shows how to use get-provisioned-concurrency-config.

Amazon CLI

To view a provisioned concurrency configuration

The following get-provisioned-concurrency-config example displays details for the provisioned concurrency configuration for the BLUE alias of the specified function.

aws lambda get-provisioned-concurrency-config \
    --function-name my-function \
    --qualifier BLUE

Output:

{
    "RequestedProvisionedConcurrentExecutions": 100,
    "AvailableProvisionedConcurrentExecutions": 100,
    "AllocatedProvisionedConcurrentExecutions": 100,
    "Status": "READY",
    "LastModified": "2019-12-31T20:28:49+0000"
}

The following code example shows how to use invoke.

Amazon CLI

Example 1: To invoke a Lambda function synchronously

The following invoke example invokes the my-function function synchronously. The cli-binary-format option is required if you're using Amazon CLI version 2. For more information, see Amazon CLI supported global command line options in the Amazon Command Line Interface User Guide.

aws lambda invoke \
    --function-name my-function \
    --cli-binary-format raw-in-base64-out \
    --payload '{ "name": "Bob" }' \
    response.json

Output:

{
    "ExecutedVersion": "$LATEST",
    "StatusCode": 200
}

For more information, see Invoke a Lambda function synchronously in the Amazon Lambda Developer Guide.

Example 2: To invoke a Lambda function asynchronously

The following invoke example invokes the my-function function asynchronously. The cli-binary-format option is required if you're using Amazon CLI version 2. For more information, see Amazon CLI supported global command line options in the Amazon Command Line Interface User Guide.

aws lambda invoke \
    --function-name my-function \
    --invocation-type Event \
    --cli-binary-format raw-in-base64-out \
    --payload '{ "name": "Bob" }' \
    response.json

Output:

{
    "StatusCode": 202
}

For more information, see Invoking a Lambda function asynchronously in the Amazon Lambda Developer Guide.

  • For API details, see Invoke in Amazon CLI Command Reference.

The following code example shows how to use list-aliases.

Amazon CLI

To retrieve the list of aliases for a Lambda function

The following list-aliases example displays a list of the aliases for the my-function Lambda function.

aws lambda list-aliases \
    --function-name my-function

Output:

{
    "Aliases": [
        {
            "AliasArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:BETA",
            "RevisionId": "a410117f-ab16-494e-8035-7e204bb7933b",
            "FunctionVersion": "2",
            "Name": "BETA",
            "Description": "alias for beta version of function"
        },
        {
            "AliasArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:LIVE",
            "RevisionId": "21d40116-f8b1-40ba-9360-3ea284da1bb5",
            "FunctionVersion": "1",
            "Name": "LIVE",
            "Description": "alias for live version of function"
        }
    ]
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see ListAliases in Amazon CLI Command Reference.

The following code example shows how to use list-event-source-mappings.

Amazon CLI

To list the event source mappings for a function

The following list-event-source-mappings example displays a list of the event source mappings for the my-function Lambda function.

aws lambda list-event-source-mappings \
    --function-name my-function

Output:

{
    "EventSourceMappings": [
        {
            "UUID": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
            "StateTransitionReason": "USER_INITIATED",
            "LastModified": 1569284520.333,
            "BatchSize": 5,
            "State": "Enabled",
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
            "EventSourceArn": "arn:aws:sqs:us-west-2:123456789012:mySQSqueue"
        }
    ]
}

For more information, see Amazon Lambda Event Source Mapping in the Amazon Lambda Developer Guide.

The following code example shows how to use list-function-event-invoke-configs.

Amazon CLI

To view a list of asynchronous invocation configurations

The following list-function-event-invoke-configs example lists the asynchronous invocation configurations for the specified function.

aws lambda list-function-event-invoke-configs \
    --function-name my-function

Output:

{
    "FunctionEventInvokeConfigs": [
        {
            "LastModified": 1577824406.719,
            "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:GREEN",
            "MaximumRetryAttempts": 2,
            "MaximumEventAgeInSeconds": 1800
        },
        {
            "LastModified": 1577824396.653,
            "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:BLUE",
            "MaximumRetryAttempts": 0,
            "MaximumEventAgeInSeconds": 3600
        }
    ]
}

The following code example shows how to use list-functions.

Amazon CLI

To retrieve a list of Lambda functions

The following list-functions example displays a list of all of the functions for the current user.

aws lambda list-functions

Output:

{
    "Functions": [
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "dBG9m8SGdmlEjw/JYXlhhvCrAv5TxvXsbL/RMr0fT/I=",
            "FunctionName": "helloworld",
            "MemorySize": 128,
            "RevisionId": "1718e831-badf-4253-9518-d0644210af7b",
            "CodeSize": 294,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:helloworld",
            "Handler": "helloworld.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/MyTestFunction-role-zgur6bf4",
            "Timeout": 3,
            "LastModified": "2025-09-23T18:32:33.857+0000",
            "Runtime": "nodejs22.x",
            "Description": ""
        },
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "sU0cJ2/hOZevwV/lTxCuQqK3gDZP3i8gUoqUUVRmY6E=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "93017fc9-59cb-41dc-901b-4845ce4bf668",
            "CodeSize": 266,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2025-10-01T16:47:28.490+0000",
            "Runtime": "nodejs22.x",
            "Description": ""
        },
        {
            "Layers": [
                {
                    "CodeSize": 41784542,
                    "Arn": "arn:aws:lambda:us-west-2:420165488524:layer:AWSLambda-Python37-SciPy1x:2"
                },
                {
                    "CodeSize": 4121,
                    "Arn": "arn:aws:lambda:us-west-2:123456789012:layer:pythonLayer:1"
                }
            ],
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "ZQukCqxtkqFgyF2cU41Avj99TKQ/hNihPtDtRcc08mI=",
            "FunctionName": "my-python-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 128,
            "RevisionId": "80b4eabc-acf7-4ea8-919a-e874c213707d",
            "CodeSize": 299,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-python-function",
            "Handler": "lambda_function.lambda_handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/my-python-function-role-z5g7dr6n",
            "Timeout": 3,
            "LastModified": "2025-10-01T19:40:41.643+0000",
            "Runtime": "python3.11",
            "Description": ""
        }
    ]
}

For more information, see Configure Lambda function memory in the Amazon Lambda Developer Guide.

  • For API details, see ListFunctions in Amazon CLI Command Reference.

The following code example shows how to use list-layer-versions.

Amazon CLI

To list the versions of an Amazon Lambda layer

The following list-layers-versions example displays information about the versions for the layer named my-layer.

aws lambda list-layer-versions \
    --layer-name my-layer

Output:

{
    "Layers": [
        {
            "LayerVersionArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer:2",
            "Version": 2,
            "Description": "My layer",
            "CreatedDate": "2023-11-15T00:37:46.592+0000",
            "CompatibleRuntimes": [
                "python3.10",
                "python3.11"
            ]
        }
    ]
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use list-layers.

Amazon CLI

To list the layers that are compatible with your function's runtime

The following list-layers example displays information about layers that are compatible with the Python 3.11 runtime.

aws lambda list-layers \
    --compatible-runtime python3.11

Output:

{
    "Layers": [
        {
            "LayerName": "my-layer",
            "LayerArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer",
            "LatestMatchingVersion": {
                "LayerVersionArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer:2",
                "Version": 2,
                "Description": "My layer",
                "CreatedDate": "2023-11-15T00:37:46.592+0000",
                "CompatibleRuntimes": [
                    "python3.10",
                    "python3.11"
                ]
            }
        }
    ]
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

  • For API details, see ListLayers in Amazon CLI Command Reference.

The following code example shows how to use list-provisioned-concurrency-configs.

Amazon CLI

To get a list of provisioned concurrency configurations

The following list-provisioned-concurrency-configs example lists the provisioned concurrency configurations for the specified function.

aws lambda list-provisioned-concurrency-configs \
    --function-name my-function

Output:

{
    "ProvisionedConcurrencyConfigs": [
        {
            "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:GREEN",
            "RequestedProvisionedConcurrentExecutions": 100,
            "AvailableProvisionedConcurrentExecutions": 100,
            "AllocatedProvisionedConcurrentExecutions": 100,
            "Status": "READY",
            "LastModified": "2019-12-31T20:29:00+0000"
        },
        {
            "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:BLUE",
            "RequestedProvisionedConcurrentExecutions": 100,
            "AvailableProvisionedConcurrentExecutions": 100,
            "AllocatedProvisionedConcurrentExecutions": 100,
            "Status": "READY",
            "LastModified": "2019-12-31T20:28:49+0000"
        }
    ]
}

The following code example shows how to use list-tags.

Amazon CLI

To retrieve the list of tags for a Lambda function

The following list-tags example displays the tags attached to the my-function Lambda function.

aws lambda list-tags \
    --resource arn:aws:lambda:us-west-2:123456789012:function:my-function

Output:

{
    "Tags": {
        "Category": "Web Tools",
        "Department": "Sales"
    }
}

For more information, see Tagging Lambda Functions in the Amazon Lambda Developer Guide.

  • For API details, see ListTags in Amazon CLI Command Reference.

The following code example shows how to use list-versions-by-function.

Amazon CLI

To retrieve a list of versions of a function

The following list-versions-by-function example displays the list of versions for the my-function Lambda function.

aws lambda list-versions-by-function \
    --function-name my-function

Output:

{
    "Versions": [
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "$LATEST",
            "CodeSha256": "sU0cJ2/hOZevwV/lTxCuQqK3gDZP3i8gUoqUUVRmY6E=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "93017fc9-59cb-41dc-901b-4845ce4bf668",
            "CodeSize": 266,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:$LATEST",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-10-01T16:47:28.490+0000",
            "Runtime": "nodejs10.x",
            "Description": ""
        },
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "1",
            "CodeSha256": "5tT2qgzYUHoqwR616pZ2dpkn/0J1FrzJmlKidWaaCgk=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "949c8914-012e-4795-998c-e467121951b1",
            "CodeSize": 304,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:1",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-09-26T20:28:40.438+0000",
            "Runtime": "nodejs10.x",
            "Description": "new version"
        },
        {
            "TracingConfig": {
                "Mode": "PassThrough"
            },
            "Version": "2",
            "CodeSha256": "sU0cJ2/hOZevwV/lTxCuQqK3gDZP3i8gUoqUUVRmY6E=",
            "FunctionName": "my-function",
            "VpcConfig": {
                "SubnetIds": [],
                "VpcId": "",
                "SecurityGroupIds": []
            },
            "MemorySize": 256,
            "RevisionId": "cd669f21-0f3d-4e1c-9566-948837f2e2ea",
            "CodeSize": 266,
            "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:2",
            "Handler": "index.handler",
            "Role": "arn:aws:iam::123456789012:role/service-role/helloWorldPython-role-uy3l9qyq",
            "Timeout": 3,
            "LastModified": "2019-10-01T16:47:28.490+0000",
            "Runtime": "nodejs10.x",
            "Description": "newer version"
        }
    ]
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

The following code example shows how to use publish-layer-version.

Amazon CLI

To create a Lambda layer version

The following publish-layer-version example creates a new Python library layer version. The command retrieves the layer content a file named layer.zip in the specified S3 bucket.

aws lambda publish-layer-version \
    --layer-name my-layer \
    --description "My Python layer" \
    --license-info "MIT" \
    --content S3Bucket=lambda-layers-us-west-2-123456789012,S3Key=layer.zip \
    --compatible-runtimes python3.10 python3.11

Output:

{
    "Content": {
        "Location": "https://awslambda-us-west-2-layers.s3.us-west-2.amazonaws.com/snapshots/123456789012/my-layer-4aaa2fbb-ff77-4b0a-ad92-5b78a716a96a?versionId=27iWyA73cCAYqyH...",
        "CodeSha256": "tv9jJO+rPbXUUXuRKi7CwHzKtLDkDRJLB3cC3Z/ouXo=",
        "CodeSize": 169
    },
    "LayerArn": "arn:aws:lambda:us-west-2:123456789012:layer:my-layer",
    "LayerVersionArn": "arn:aws:lambda:us-west-2:123456789012:layer:my-layer:1",
    "Description": "My Python layer",
    "CreatedDate": "2023-11-14T23:03:52.894+0000",
    "Version": 1,
    "LicenseInfo": "MIT",
    "CompatibleRuntimes": [
        "python3.10",
        "python3.11"
    ]
}

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use publish-version.

Amazon CLI

To publish a new version of a function

The following publish-version example publishes a new version of the my-function Lambda function.

aws lambda publish-version \
    --function-name my-function

Output:

{
    "TracingConfig": {
        "Mode": "PassThrough"
    },
    "CodeSha256": "dBG9m8SGdmlEjw/JYXlhhvCrAv5TxvXsbL/RMr0fT/I=",
    "FunctionName": "my-function",
    "CodeSize": 294,
    "RevisionId": "f31d3d39-cc63-4520-97d4-43cd44c94c20",
    "MemorySize": 128,
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:3",
    "Version": "2",
    "Role": "arn:aws:iam::123456789012:role/service-role/MyTestFunction-role-zgur6bf4",
    "Timeout": 3,
    "LastModified": "2019-09-23T18:32:33.857+0000",
    "Handler": "my-function.handler",
    "Runtime": "nodejs10.x",
    "Description": ""
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see PublishVersion in Amazon CLI Command Reference.

The following code example shows how to use put-function-concurrency.

Amazon CLI

To configure a reserved concurrency limit for a function

The following put-function-concurrency example configures 100 reserved concurrent executions for the my-function function.

aws lambda put-function-concurrency \
    --function-name  my-function  \
    --reserved-concurrent-executions 100

Output:

{
    "ReservedConcurrentExecutions": 100
}

For more information, see Reserving Concurrency for a Lambda Function in the Amazon Lambda Developer Guide.

The following code example shows how to use put-function-event-invoke-config.

Amazon CLI

To configure error handling for asynchronous invocation

The following put-function-event-invoke-config example sets a maximum event age of one hour and disables retries for the specified function.

aws lambda put-function-event-invoke-config \
    --function-name my-function \
    --maximum-event-age-in-seconds 3600 \
    --maximum-retry-attempts 0

Output:

{
    "LastModified": 1573686021.479,
    "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:$LATEST",
    "MaximumRetryAttempts": 0,
    "MaximumEventAgeInSeconds": 3600,
    "DestinationConfig": {
        "OnSuccess": {},
        "OnFailure": {}
    }
}

The following code example shows how to use put-provisioned-concurrency-config.

Amazon CLI

To allocate provisioned concurrency

The following put-provisioned-concurrency-config example allocates 100 provisioned concurrency for the BLUE alias of the specified function.

aws lambda put-provisioned-concurrency-config \
    --function-name my-function \
    --qualifier BLUE \
    --provisioned-concurrent-executions 100

Output:

{
    "Requested ProvisionedConcurrentExecutions": 100,
    "Allocated ProvisionedConcurrentExecutions": 0,
    "Status": "IN_PROGRESS",
    "LastModified": "2019-11-21T19:32:12+0000"
}

The following code example shows how to use remove-layer-version-permission.

Amazon CLI

To delete layer-version permissions

The following remove-layer-version-permission example deletes permission for an account to configure a layer version.

aws lambda remove-layer-version-permission \
    --layer-name my-layer \
    --statement-id xaccount \
    --version-number 1

This command produces no output.

For more information, see Amazon Lambda Layers in the Amazon Lambda Developer Guide.

The following code example shows how to use remove-permission.

Amazon CLI

To remove permissions from an existing Lambda function

The following remove-permission example removes permission to invoke a function named my-function.

aws lambda remove-permission \
    --function-name my-function \
    --statement-id sns

This command produces no output.

For more information, see Using Resource-based Policies for Amazon Lambda in the Amazon Lambda Developer Guide.

The following code example shows how to use tag-resource.

Amazon CLI

To add tags to an existing Lambda function

The following tag-resource example adds a tag with the key name DEPARTMENT and a value of Department A to the specified Lambda function.

aws lambda tag-resource \
    --resource arn:aws:lambda:us-west-2:123456789012:function:my-function \
    --tags "DEPARTMENT=Department A"

This command produces no output.

For more information, see Tagging Lambda Functions in the Amazon Lambda Developer Guide.

  • For API details, see TagResource in Amazon CLI Command Reference.

The following code example shows how to use untag-resource.

Amazon CLI

To remove tags from an existing Lambda function

The following untag-resource example removes the tag with the key name DEPARTMENT tag from the my-function Lambda function.

aws lambda untag-resource \
    --resource arn:aws:lambda:us-west-2:123456789012:function:my-function \
    --tag-keys DEPARTMENT

This command produces no output.

For more information, see Tagging Lambda Functions in the Amazon Lambda Developer Guide.

  • For API details, see UntagResource in Amazon CLI Command Reference.

The following code example shows how to use update-alias.

Amazon CLI

To update a function alias

The following update-alias example updates the alias named LIVE to point to version 3 of the my-function Lambda function.

aws lambda update-alias \
    --function-name my-function \
    --function-version 3 \
    --name LIVE

Output:

{
    "FunctionVersion": "3",
    "Name": "LIVE",
    "AliasArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function:LIVE",
    "RevisionId": "594f41fb-b85f-4c20-95c7-6ca5f2a92c93",
    "Description": "alias for live version of function"
}

For more information, see Configuring Amazon Lambda Function Aliases in the Amazon Lambda Developer Guide.

  • For API details, see UpdateAlias in Amazon CLI Command Reference.

The following code example shows how to use update-event-source-mapping.

Amazon CLI

To update the mapping between an event source and an Amazon Lambda function

The following update-event-source-mapping example updates the batch size to 8 in the specified mapping.

aws lambda update-event-source-mapping \
    --uuid  "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE" \
    --batch-size 8

Output:

{
    "UUID": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
    "StateTransitionReason": "USER_INITIATED",
    "LastModified": 1569284520.333,
    "BatchSize": 8,
    "State": "Updating",
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "EventSourceArn": "arn:aws:sqs:us-west-2:123456789012:mySQSqueue"
}

For more information, see Amazon Lambda Event Source Mapping in the Amazon Lambda Developer Guide.

The following code example shows how to use update-function-code.

Amazon CLI

To update the code of a Lambda function

The following update-function-code example replaces the code of the unpublished ($LATEST) version of the my-function function with the contents of the specified zip file.

aws lambda update-function-code \
    --function-name  my-function \
    --zip-file fileb://my-function.zip

Output:

{
    "FunctionName": "my-function",
    "LastModified": "2019-09-26T20:28:40.438+0000",
    "RevisionId": "e52502d4-9320-4688-9cd6-152a6ab7490d",
    "MemorySize": 256,
    "Version": "$LATEST",
    "Role": "arn:aws:iam::123456789012:role/service-role/my-function-role-uy3l9qyq",
    "Timeout": 3,
    "Runtime": "nodejs10.x",
    "TracingConfig": {
        "Mode": "PassThrough"
    },
    "CodeSha256": "5tT2qgzYUHaqwR716pZ2dpkn/0J1FrzJmlKidWoaCgk=",
    "Description": "",
    "VpcConfig": {
        "SubnetIds": [],
        "VpcId": "",
        "SecurityGroupIds": []
    },
    "CodeSize": 304,
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "Handler": "index.handler"
}

For more information, see Amazon Lambda Function Configuration in the Amazon Lambda Developer Guide.

The following code example shows how to use update-function-configuration.

Amazon CLI

To modify the configuration of a function

The following update-function-configuration example modifies the memory size to be 256 MB for the unpublished ($LATEST) version of the my-function function.

aws lambda update-function-configuration \
    --function-name  my-function \
    --memory-size 256

Output:

{
    "FunctionName": "my-function",
    "LastModified": "2019-09-26T20:28:40.438+0000",
    "RevisionId": "e52502d4-9320-4688-9cd6-152a6ab7490d",
    "MemorySize": 256,
    "Version": "$LATEST",
    "Role": "arn:aws:iam::123456789012:role/service-role/my-function-role-uy3l9qyq",
    "Timeout": 3,
    "Runtime": "nodejs10.x",
    "TracingConfig": {
        "Mode": "PassThrough"
    },
    "CodeSha256": "5tT2qgzYUHaqwR716pZ2dpkn/0J1FrzJmlKidWoaCgk=",
    "Description": "",
    "VpcConfig": {
        "SubnetIds": [],
        "VpcId": "",
        "SecurityGroupIds": []
    },
    "CodeSize": 304,
    "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function",
    "Handler": "index.handler"
}

For more information, see Amazon Lambda Function Configuration in the Amazon Lambda Developer Guide.

The following code example shows how to use update-function-event-invoke-config.

Amazon CLI

To update an asynchronous invocation configuration

The following update-function-event-invoke-config example adds an on-failure destination to the existing asynchronous invocation configuration for the specified function.

aws lambda update-function-event-invoke-config \
    --function-name my-function \
    --destination-config '{"OnFailure":{"Destination": "arn:aws:sqs:us-east-2:123456789012:destination"}}'

Output:

{
    "LastModified": 1573687896.493,
    "FunctionArn": "arn:aws:lambda:us-east-2:123456789012:function:my-function:$LATEST",
    "MaximumRetryAttempts": 0,
    "MaximumEventAgeInSeconds": 3600,
    "DestinationConfig": {
        "OnSuccess": {},
        "OnFailure": {
            "Destination": "arn:aws:sqs:us-east-2:123456789012:destination"
        }
    }
}