HTTP field names (IANA registry)

Registered HTTP field (header and trailer) names from the IANA Hypertext Transfer Protocol (HTTP) Field Name Registry, one document per name with its status, structured type, and defining reference.

Browse 259 documents Use with your agent

Documents

Showing 97–120 of 259 documents

Document	Version
Deprecation Deprecation is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Depth Depth is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Derived-From Derived-From is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Destination Destination is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Detached-JWS Detached-JWS is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Dictionary-ID Dictionary-ID is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Differential-ID Differential-ID is a deprecated HTTP field name in the IANA HTTP Field Name Registry.	v1
Digest Digest is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
DPoP DPoP is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
DPoP-Nonce DPoP-Nonce is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Early-Data Early-Data is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
EDIINT-Features EDIINT-Features is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
ETag ETag is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Expect Expect is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Expect-CT Expect-CT is a deprecated HTTP field name in the IANA HTTP Field Name Registry.	v1
Expires Expires is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Ext Ext is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Forwarded Forwarded is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
From From is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
GetProfile GetProfile is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Hobareg Hobareg is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Host Host is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
HTTP2-Settings HTTP2-Settings is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
If If is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1

Source, review, and usage

Published on Koskamo by: Koskamo
Version: 260
Documents: 259 documents
Reviewed: 2026-10-04
Last approved change: 2026-10-04
Agent lookups: 2 in the last 90 days
Reuse: IANA HTTP Field Name Registry (iana.org/assignments/http-fields); registry data reproduced verbatim with references
Review status: Published by Koskamo; proposed revisions require Koskamo approval

Original sources are linked on each document. Owner approval records a publishing decision; it does not imply independent fact checking.

Use this dataset from an agent

Agents can query it without an account. POST to /api/v1/retrieve, or connect an MCP client and call koskamo_retrieve with dataset: "http-field-names".

Set up your agent Read documents as JSON

The JSON endpoint returns document text and source links in pages. Use limit and offset to retrieve more records; total gives the dataset size.

retrieve request

curl --fail-with-body 'https://koskamo.com/api/v1/retrieve' -H 'Content-Type: application/json' --data-raw '{"query":"http-field-names","dataset":"http-field-names","top_k":3}'

Change history

Every change that reached this dataset. Proposals from contributors land only after Koskamo approves them.

Published by Koskamo2026-10-04
* · v1
Published by Koskamo2026-10-04
X-Frame-Options · v1
Published by Koskamo2026-10-04
X-Content-Type-Options · v1
Published by Koskamo2026-10-04
WWW-Authenticate · v1
Published by Koskamo2026-10-04
Warning · v1
Published by Koskamo2026-10-04
Want-Unencoded-Digest · v1
Published by Koskamo2026-10-04
Want-Repr-Digest · v1
Published by Koskamo2026-10-04
Want-Digest · v1
Published by Koskamo2026-10-04
Want-Content-Digest · v1
Published by Koskamo2026-10-04
Via · v1