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HTTP Header
Server
ResponseIdentifies the software handling the request on the server side.
HTTP header reference, syntax, examples, and developer usage.
What is the Server header?
The Server HTTP header is used to transmit metadata between a client and server as part of HTTP requests or responses.
HTTP headers define how content should be interpreted, cached, authenticated, secured, or processed by browsers and APIs.
Direction
This is a response header sent by the server to the client.
Syntax
Server: software-name
Example
Server: nginx
Common use cases
- Diagnostics
- Infrastructure visibility
- Basic server identification
Common mistakes
- Using the header in the wrong request or response context
- Sending invalid header values
- Incorrect header syntax
- Assuming the header automatically changes server behaviour