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HTTP Request Header Reference

Look up common HTTP request headers and quickly review client, auth and caching related fields.

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HTTPRequest HeadersReference
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How to use

How to use HTTP Request Header Reference

1 Search by a request header or keyword.
2 Review the matching purpose and category.
3 Copy the lookup result when needed.
Common uses

HTTP Request Header Reference works well for these tasks

Understand auth and session headers

Check browser request metadata

Teach request header differences quickly

Recommended flow

Understand the request before you debug the response

HTTP Request Header Reference → HTTP Response Header Reference → HTTP Status Code Lookup → MIME Type Reference
FAQ

Frequently asked questions

What is HTTP Request Header Reference useful for?

Understand auth and session headers

How do I start using HTTP Request Header Reference?

Search by a request header or keyword. Review the matching purpose and category. Copy the lookup result when needed.

What should I do after this result?

Most people continue with HTTP Response Header Reference, HTTP Status Code Lookup, Random User-Agent Generator next.