# ConnectionHeaderParameter
<a name="API_ConnectionHeaderParameter"></a>

Additional parameter included in the header. You can include up to 100 additional header parameters per request. An event payload cannot exceed 64 KB.

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

 ** IsValueSecret **   <a name="eventbridge-Type-ConnectionHeaderParameter-IsValueSecret"></a>
Specifies whether the value is a secret.  
Type: Boolean  
Required: No

 ** Key **   <a name="eventbridge-Type-ConnectionHeaderParameter-Key"></a>
The key for the parameter.  
Type: String  
Length Constraints: Maximum length of 512.  
Pattern: `^[!#$%&'*+-.^_`|~0-9a-zA-Z]+$`   
Required: No

 ** Value **   <a name="eventbridge-Type-ConnectionHeaderParameter-Value"></a>
The value associated with the key.  
Type: String  
Length Constraints: Maximum length of 512.  
Pattern: `^[ \t]*[\x20-\x7E]+([ \t]+[\x20-\x7E]+)*[ \t]*$`   
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/eventbridge-2015-10-07/ConnectionHeaderParameter) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/eventbridge-2015-10-07/ConnectionHeaderParameter) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/eventbridge-2015-10-07/ConnectionHeaderParameter)