I am using the library Network Error Logging to add NEL header and report-to to add Report-To header on my Express.js server. My code is like More info about them can be found at https://www.w3.org/TR/reporting/ https://www.w3.org/TR/network-error-logging/#network-error-reports https://scotthelme.co.uk/network-error-logging-deep-dive/ I was using use https://report-uri.com to collect NEL errors before and it works well. It collected different kinds of NEL errors as the