This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::Events::Connection Parameter
<a name="aws-properties-events-connection-parameter"></a>

Any additional query string parameter for the connection. You can include up to 100 additional query string parameters per request. Each additional parameter counts towards the event payload size, which cannot exceed 64 KB.

## Syntax
<a name="aws-properties-events-connection-parameter-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-events-connection-parameter-syntax.json"></a>

```
{
  "[IsValueSecret](#cfn-events-connection-parameter-isvaluesecret)" : Boolean,
  "[Key](#cfn-events-connection-parameter-key)" : String,
  "[Value](#cfn-events-connection-parameter-value)" : String
}
```

### YAML
<a name="aws-properties-events-connection-parameter-syntax.yaml"></a>

```
  [IsValueSecret](#cfn-events-connection-parameter-isvaluesecret): Boolean
  [Key](#cfn-events-connection-parameter-key): String
  [Value](#cfn-events-connection-parameter-value): String
```

## Properties
<a name="aws-properties-events-connection-parameter-properties"></a>

`IsValueSecret`  <a name="cfn-events-connection-parameter-isvaluesecret"></a>
Specifies whether the value is secret.  
*Required*: No  
*Type*: Boolean  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Key`  <a name="cfn-events-connection-parameter-key"></a>
The key for a query string parameter.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[^\x00-\x1F\x7F]+`  
*Maximum*: `512`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`Value`  <a name="cfn-events-connection-parameter-value"></a>
The value associated with the key for the query string parameter.  
*Required*: Yes  
*Type*: String  
*Pattern*: `[^\x00-\x09\x0B\x0C\x0E-\x1F\x7F]+`  
*Maximum*: `512`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)