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 73–96 of 259 documents

Document	Version
Content-Language Content-Language is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Length Content-Length is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Location Content-Location is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-MD5 Content-MD5 is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Range Content-Range is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Script-Type Content-Script-Type is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Security-Policy Content-Security-Policy is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Security-Policy-Report-Only Content-Security-Policy-Report-Only is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Style-Type Content-Style-Type is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Type Content-Type is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Content-Version Content-Version is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Cookie Cookie is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cookie2 Cookie2 is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Cross-Origin-Embedder-Policy Cross-Origin-Embedder-Policy is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cross-Origin-Embedder-Policy-Report-Only Cross-Origin-Embedder-Policy-Report-Only is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cross-Origin-Opener-Policy Cross-Origin-Opener-Policy is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cross-Origin-Opener-Policy-Report-Only Cross-Origin-Opener-Policy-Report-Only is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Cross-Origin-Resource-Policy Cross-Origin-Resource-Policy is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
CTA-Common-Access-Token CTA-Common-Access-Token is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
DASL DASL is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Date Date is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
DAV DAV is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Default-Style Default-Style is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Delta-Base Delta-Base 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