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 25–48 of 259 documents

Document	Version
Activate-Storage-Access Activate-Storage-Access is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Age Age is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Allow Allow is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
ALPN ALPN is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Alt-Svc Alt-Svc is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Alt-Used Alt-Used is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Alternates Alternates is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
AMP-Cache-Transform AMP-Cache-Transform is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Apply-To-Redirect-Ref Apply-To-Redirect-Ref is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Authentication-Control Authentication-Control is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Authentication-Info Authentication-Info is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Authorization Authorization is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Available-Dictionary Available-Dictionary is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
C-Ext C-Ext is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
C-Man C-Man is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
C-Opt C-Opt is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
C-PEP C-PEP is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
C-PEP-Info C-PEP-Info is a deprecated HTTP field name in the IANA HTTP Field Name Registry.	v1
Cache-Control Cache-Control is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cache-Group-Invalidation Cache-Group-Invalidation is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cache-Groups Cache-Groups is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cache-Status Cache-Status is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cal-Managed-ID Cal-Managed-ID is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
CalDAV-Timezones CalDAV-Timezones 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