# MutualTlsAuthenticationInput
<a name="API_MutualTlsAuthenticationInput"></a>

The mutual TLS authentication configuration for a custom domain name. If specified, API Gateway performs two-way authentication between the client and the server. Clients must present a trusted certificate to access your API.

## Contents
<a name="API_MutualTlsAuthenticationInput_Contents"></a>

 ** truststoreUri **   <a name="apigw-Type-MutualTlsAuthenticationInput-truststoreUri"></a>
An Amazon S3 URL that specifies the truststore for mutual TLS authentication, for example `s3://bucket-name/key-name`. The truststore can contain certificates from public or private certificate authorities. To update the truststore, upload a new version to S3, and then update your custom domain name to use the new version. To update the truststore, you must have permissions to access the S3 object.  
Type: String  
Required: No

 ** truststoreVersion **   <a name="apigw-Type-MutualTlsAuthenticationInput-truststoreVersion"></a>
The version of the S3 object that contains your truststore. To specify a version, you must have versioning enabled for the S3 bucket  
Type: String  
Required: No

## See Also
<a name="API_MutualTlsAuthenticationInput_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/apigateway-2015-07-09/MutualTlsAuthenticationInput) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/apigateway-2015-07-09/MutualTlsAuthenticationInput) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/apigateway-2015-07-09/MutualTlsAuthenticationInput) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon API Gateway. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query apigateway` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).