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 193–216 of 259 documents

Document	Version
Repeatability-Client-ID Repeatability-Client-ID is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Repeatability-First-Sent Repeatability-First-Sent is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Repeatability-Request-ID Repeatability-Request-ID is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Repeatability-Result Repeatability-Result is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Replay-Nonce Replay-Nonce is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Reporting-Endpoints Reporting-Endpoints is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Repr-Digest Repr-Digest is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Retry-After Retry-After is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Safe Safe is an obsoleted HTTP field name in the IANA HTTP Field Name Registry.	v1
Schedule-Reply Schedule-Reply is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Schedule-Tag Schedule-Tag is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Fetch-Dest Sec-Fetch-Dest is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Fetch-Mode Sec-Fetch-Mode is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Fetch-Site Sec-Fetch-Site is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Fetch-Storage-Access Sec-Fetch-Storage-Access is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Fetch-User Sec-Fetch-User is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-GPC Sec-GPC is a provisional HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Purpose Sec-Purpose is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-Token-Binding Sec-Token-Binding is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-WebSocket-Accept Sec-WebSocket-Accept is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-WebSocket-Extensions Sec-WebSocket-Extensions is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-WebSocket-Key Sec-WebSocket-Key is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-WebSocket-Protocol Sec-WebSocket-Protocol is a permanent HTTP field name in the IANA HTTP Field Name Registry.	v1
Sec-WebSocket-Version Sec-WebSocket-Version 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