The HTTP Headers tab is available at /http/<domain>. It
makes independent HTTP and HTTPS requests and displays the response status
and headers returned by each protocol.
You can include a port after the hostname, such as
example.com:8080. When a port is supplied, both protocol
checks request that port.
Custom ports
Use hostname:port when a web service is listening somewhere
other than the standard HTTP or HTTPS ports. For example, a lookup for
example.com:8080 requests http://example.com:8080/
and https://example.com:8080/.
The port applies only to the HTTP Headers and Certificate tabs. Domain-only checks such as DNS Records, DNS Propagation, and WHOIS/RDAP continue to use the hostname without the port.
Independent protocol checks
HTTP and HTTPS are checked separately. If one protocol fails, the other protocol can still show its response when available.
What the table shows
- URL: the HTTP or HTTPS URL that was requested.
- Status: the numeric response code and reason phrase.
- Header: the response header name.
- Value: the response header value returned by the server.
Access
HTTP Headers are available to logged-in users. Anonymous visitors see a login prompt on this tab.