What they are?
Self-assess your web assets with
References
Tools
Securityheaders.io -> Check the HTTP security used
Report-uri.io -> Tools
Check in a human readable way the CSP Headers
Construct the CSP policies for a given website
CSP Fiddler Extension - Build the CSP for you
NWebsec - For ASP MVC (Web.config) - easy way to configure CSP in .NET framework
Report-uri.io -> read and store CSP reports