# ListFunctions
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Set `FunctionVersion` to `ALL` to include all published versions of each function in addition to the unpublished version.
**Note**
The `ListFunctions` operation returns a subset of the [FunctionConfiguration](API_FunctionConfiguration.md) fields. To get the additional fields (State, StateReasonCode, StateReason, LastUpdateStatus, LastUpdateStatusReason, LastUpdateStatusReasonCode, RuntimeVersionConfig) for a function or version, use [GetFunction](API_GetFunction.md).
## 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.
** [FunctionVersion](#API_ListFunctions_RequestSyntax) **
Set to `ALL` to include entries for all published versions of each function.
Valid Values: `ALL`
** [Marker](#API_ListFunctions_RequestSyntax) **
Specify the pagination token that's returned by a previous request to retrieve the next page of results.
** [MasterRegion](#API_ListFunctions_RequestSyntax) **
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}`
** [MaxItems](#API_ListFunctions_RequestSyntax) **
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" ],
"CapacityProviderConfig": {
"LambdaManagedInstancesCapacityProviderConfig": {
"CapacityProviderArn": "string",
"ExecutionEnvironmentMemoryGiBPerVCpu": number,
"PerExecutionEnvironmentMaxConcurrency": number
}
},
"CodeSha256": "string",
"CodeSize": number,
"ConfigSha256": "string",
"DeadLetterConfig": {
"TargetArn": "string"
},
"Description": "string",
"DurableConfig": {
"ExecutionTimeout": number,
"RetentionPeriodInDays": number
},
"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",
"TenancyConfig": {
"TenantIsolationMode": "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.
** [Functions](#API_ListFunctions_ResponseSyntax) **
A list of Lambda functions.
Type: Array of [FunctionConfiguration](API_FunctionConfiguration.md) objects
** [NextMarker](#API_ListFunctions_ResponseSyntax) **
The pagination token that's included if more results are available.
Type: String
## Errors
For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).
** InvalidParameterValueException **
One of the parameters in the request is not valid.
** message **
The exception message.
** Type **
The exception type.
HTTP Status Code: 400
** ServiceException **
The AWS Lambda service encountered an internal error.
HTTP Status Code: 500
** TooManyRequestsException **
The request throughput limit was exceeded. For more information, see [Lambda quotas](https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-limits.html#api-requests).
** retryAfterSeconds **
The number of seconds the caller should wait before retrying.
HTTP Status Code: 429
## See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
+ [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/lambda-2015-03-31/ListFunctions)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lambda-2015-03-31/ListFunctions)