Access-Control-Allow-Origin

Allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served (Indicates whether the response can be shared.)

Header usage statistics

Access-Control-Allow-Origin response header information and usage statistics.

Websites using header Access-Control-Allow-Origin	2,196,184
Percentage of websites that use Access-Control-Allow-Origin header	3.58%
Total discovered header values	More than 10,000
Header uses directives	Yes
Header values are unique or random	No
Most popular in the country	United States