CreateRegexPatternSet - AWS WAFV2


Creates a RegexPatternSet, which you reference in a RegexPatternSetReferenceStatement, to have AWS WAF inspect a web request component for the specified patterns.

Request Syntax

{ "Description": "string", "Name": "string", "RegularExpressionList": [ { "RegexString": "string" } ], "Scope": "string", "Tags": [ { "Key": "string", "Value": "string" } ] }

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.


A description of the set that helps with identification.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: ^[\w+=:#@/\-,\.][\w+=:#@/\-,\.\s]+[\w+=:#@/\-,\.]$

Required: No


The name of the set. You cannot change the name after you create the set.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: ^[\w\-]+$

Required: Yes


Array of regular expression strings.

Type: Array of Regex objects

Required: Yes


Specifies whether this is for an Amazon CloudFront distribution or for a regional application. A regional application can be an Application Load Balancer (ALB), an Amazon API Gateway REST API, an AWS AppSync GraphQL API, an Amazon Cognito user pool, an AWS App Runner service, or an AWS Verified Access instance.

To work with CloudFront, you must also specify the Region US East (N. Virginia) as follows:

  • CLI - Specify the Region when you use the CloudFront scope: --scope=CLOUDFRONT --region=us-east-1.

  • API and SDKs - For all calls, use the Region endpoint us-east-1.

Type: String


Required: Yes


An array of key:value pairs to associate with the resource.

Type: Array of Tag objects

Array Members: Minimum number of 1 item.

Required: No

Response Syntax

{ "Summary": { "ARN": "string", "Description": "string", "Id": "string", "LockToken": "string", "Name": "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.


High-level information about a RegexPatternSet, returned by operations like create and list. This provides information like the ID, that you can use to retrieve and manage a RegexPatternSet, and the ARN, that you provide to the RegexPatternSetReferenceStatement to use the pattern set in a Rule.

Type: RegexPatternSetSummary object


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


AWS WAF couldn’t perform the operation because the resource that you tried to save is a duplicate of an existing one.

HTTP Status Code: 400


Your request is valid, but AWS WAF couldn’t perform the operation because of a system problem. Retry your request.

HTTP Status Code: 500


The operation isn't valid.

HTTP Status Code: 400


The operation failed because AWS WAF didn't recognize a parameter in the request. For example:

  • You specified a parameter name or value that isn't valid.

  • Your nested statement isn't valid. You might have tried to nest a statement that can’t be nested.

  • You tried to update a WebACL with a DefaultAction that isn't among the types available at DefaultAction.

  • Your request references an ARN that is malformed, or corresponds to a resource with which a web ACL can't be associated.

HTTP Status Code: 400


AWS WAF couldn’t perform the operation because you exceeded your resource limit. For example, the maximum number of WebACL objects that you can create for an AWS account. For more information, see AWS WAF quotas in the AWS WAF Developer Guide.

HTTP Status Code: 400


AWS WAF couldn’t save your changes because you tried to update or delete a resource that has changed since you last retrieved it. Get the resource again, make any changes you need to make to the new copy, and retry your operation.

HTTP Status Code: 400


An error occurred during the tagging operation. Retry your request.

HTTP Status Code: 400


AWS WAF couldn’t perform your tagging operation because of an internal error. Retry your request.

HTTP Status Code: 500

See Also

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