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(X-)Content-Security-Policy
response_analyse - check syntax, semantics
This is also something that would interest me, but it might be better to wait until it becomes more stable, there's still implementation differences between Firefox and Chrome.
https://csp-evaluator.withgoogle.com
https://www.cspvalidator.org/
Also check that CSP applies to appropriate MIME-types, see https://github.com/w3c/webappsec/issues/520. For reference, H5BP settled on matching against text\/(html|javascript)|application\/pdf|xml in their apache configs.