# CloudFormation resources generated when AWS::Serverless::HttpApi is specified
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When an `AWS::Serverless::HttpApi` is specified, AWS Serverless Application Model (AWS SAM) generates an `AWS::ApiGatewayV2::Api` base CloudFormation resource.

**`AWS::ApiGatewayV2::Api`**  
*`LogicalId`: *`<httpapi‑LogicalId>`  
*Referenceable property: *N/A (you must use the `LogicalId` to reference this CloudFormation resource)

In addition to this CloudFormation resource, when `AWS::Serverless::HttpApi` is specified, AWS SAM also generates CloudFormation resources for the following scenarios:

**Topics**
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## StageName property is specified
](#sam-specification-generated-resources-httpapi-stage-name)
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## StageName property is *not* specified
](#sam-specification-generated-resources-httpapi-not-stage-name)
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## DomainName property is specified
](#sam-specification-generated-resources-httpapi-domain-name)

## StageName property is specified
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When the `StageName` property of an `AWS::Serverless::HttpApi` is specified, AWS SAM generates the `AWS::ApiGatewayV2::Stage` CloudFormation resource.

**`AWS::ApiGatewayV2::Stage`**  
*`LogicalId`: *`<httpapi‑LogicalId><stage‑name>Stage`  
`<stage‑name>` is the string that the `StageName` property is set to. For example, if you set `StageName` to `Gamma`, the `LogicalId` is: *MyHttpApiGamma*Stage.  
*Referenceable property: *`<httpapi‑LogicalId>.Stage`

## StageName property is *not* specified
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When the `StageName` property of an `AWS::Serverless::HttpApi` is *not* specified, AWS SAM generates the `AWS::ApiGatewayV2::Stage` CloudFormation resource.

**`AWS::ApiGatewayV2::Stage`**  
*`LogicalId`: *`<httpapi‑LogicalId>ApiGatewayDefaultStage`  
*Referenceable property: *`<httpapi‑LogicalId>.Stage`

## DomainName property is specified
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When the `DomainName` property of the `Domain` property of an `AWS::Serverless::HttpApi` is specified, AWS SAM generates the `AWS::ApiGatewayV2::DomainName` CloudFormation resource.

**`AWS::ApiGatewayV2::DomainName`**  
*`LogicalId`: *`ApiGatewayDomainNameV2<sha>`  
`<sha>` is a unique hash value that is generated when the stack is created. For example, `ApiGatewayDomainNameV2`*926eeb5ff1*.  
*Referenceable property: *`<httpapi‑LogicalId>.DomainName`