/#Action=ValidateTemplate
http://cloudformation.{region}.amazonaws.com/#Action=ValidateTemplateValidates a specified template. CloudFormation first checks if the template is valid JSON. If it isn't, CloudFormation checks if the template is valid YAML. If both these checks fail, CloudFormation returns a template validation error.
Query Params
<p>Structure containing the template body with a minimum length of 1 byte and a maximum length of 51,200 bytes. For more information, go to <a href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-anatomy.html">Template Anatomy</a> in the CloudFormation User Guide.</p> <p>Conditional: You must pass <code>TemplateURL</code> or <code>TemplateBody</code>. If both are passed, only <code>TemplateBody</code> is used.</p>
<p>Location of file containing the template body. The URL must point to a template (max size: 460,800 bytes) that is located in an Amazon S3 bucket or a Systems Manager document. For more information, go to <a href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-anatomy.html">Template Anatomy</a> in the CloudFormation User Guide.</p> <p>Conditional: You must pass <code>TemplateURL</code> or <code>TemplateBody</code>. If both are passed, only <code>TemplateBody</code> is used.</p>
Responses
{
"success": true,
"data": {
"id": "abc123",
"created_at": "2025-01-01T00:00:00Z"
}
}{
"success": false,
"error": {
"code": "VALIDATION_ERROR",
"message": "Invalid request parameters"
}
}1curl --request GET \2 --url 'http://cloudformation.{region}.amazonaws.com/#Action=ValidateTemplate' \3 --header 'accept: application/json' \4 --header 'content-type: application/json'1{2 "success": true,3 "data": {4 "id": "abc123",5 "created_at": "2025-01-01T00:00:00Z"6 }7}