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AWS::AppSync::Api
The AWS::AppSync::Api resource creates an AWS AppSync API that
            you can use for an AWS AppSync API with your preferred configuration, such as an
            Event API that provides real-time message publishing and message subscriptions over
            WebSockets.
Syntax
To declare this entity in your AWS CloudFormation template, use the following syntax:
JSON
{ "Type" : "AWS::AppSync::Api", "Properties" : { "EventConfig" :EventConfig, "Name" :String, "OwnerContact" :String, "Tags" :[ Tag, ... ]} }
YAML
Type: AWS::AppSync::Api Properties: EventConfig:EventConfigName:StringOwnerContact:StringTags:- Tag
Properties
- EventConfig
- 
                    Describes the authorization configuration for connections, message publishing, message subscriptions, and logging for an Event API. Required: No Type: EventConfig Update requires: No interruption 
- Name
- 
                    The name of the Api.Required: Yes Type: String Pattern: [A-Za-z0-9_\-\ ]+Minimum: 1Maximum: 50Update requires: No interruption 
- OwnerContact
- 
                    The owner contact information for an API resource. This field accepts any string input with a length of 0 - 256 characters. Required: No Type: String Pattern: [A-Za-z0-9_\-\ \.]+Minimum: 1Maximum: 250Update requires: No interruption 
- 
                    A set of tags (key-value pairs) for this API. Required: No Type: Array of Tag Update requires: No interruption 
Return values
Ref
When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns The Amazon Resource Name (ARN) of the AWS AppSync Api. For example:
                        arn:aws:appsync:us-east-1:123456789012:apis/eventapiId
                    
For more information about using the Ref function, see Ref.
Fn::GetAtt
The Fn::GetAtt intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.
For more information about using the Fn::GetAtt intrinsic function, see Fn::GetAtt.
- ApiArn
- 
                            The Amazon Resource Name (ARN) of the AWS AppSync Api. 
- ApiId
- 
                            The unique identifier for the AWS AppSync Api generated by the service. 
- Dns.Http
- 
                            The domain name of the Api's HTTP endpoint. 
- Dns.Realtime
- 
                            The domain name of the Api's real-time endpoint.