X-Nf-Request-Id

The idea of the X-Request-ID is that a client can create some random ID and pass it to the server. The server then include that ID in every log statement that it creates. If a client receives an error it can include the ID in a bug report allowing the server operator to look up the corresponding log statements (without having to rely on timestamps IPs etc).

Header usage statistics

X-Nf-Request-Id response header information and usage statistics.

Websites using header X-Nf-Request-Id	164,809
Percentage of websites that use X-Nf-Request-Id header	0.20%
Total discovered header values	More than 10,000
Header uses directives	No
Header values are unique or random	No
Most popular in the country	United States