CSP: report-to

The Content-Security-Policy Report-To HTTP response header field instructs the user agent to store reporting endpoints for an origin.

Content-Security-Policy: ...; report-to groupname

The directive has no effect in and of itself, but only gains meaning in combination with other directives.

Content-Security-Policy: report-to <json-field-value>;

See Content-Security-Policy-Report-Only for more information and examples.

Report-To: { "group": "csp-endpoint",
              "max_age": 10886400,
              "endpoints": [
                { "url": "https://example.com/csp-reports" }
              ] },
            { "group": "hpkp-endpoint",
              "max_age": 10886400,
              "endpoints": [
                { "url": "https://example.com/hpkp-reports" }
              ] }
Content-Security-Policy: ...; report-to csp-endpoint

Report-To: { "group": "endpoint-1",
              "max_age": 10886400,
              "endpoints": [
                { "url": "https://example.com/reports" },
                { "url": "https://backup.com/reports" }
              ] }

Content-Security-Policy: ...; report-to endpoint-1

• Content-Security-Policy
• Content-Security-Policy-Report-Only