Hypertext Transfer Protocol (HTTP) Field Name Registry

Created
2021-10-01
Last Updated
2021-10-22
Available Formats

XML

HTML

Plain text

Registry included below

Hypertext Transfer Protocol (HTTP) Field Name Registry

Registration Procedure(s)
Specification Required for Permanent registrations,
Expert Review for Provisional registrations. 
    
Expert(s)
Mark Nottingham, Roy Fielding
Reference
[RFC-ietf-httpbis-semantics-19]
Note
See Section 16.3 of [RFC-ietf-httpbis-semantics-19] for more
information on defining and registering new HTTP Header Fields.
    
Note
New field names, along with changes to existing ones, can be 
requested using the [registry interface] or the mailing list
defined in [RFC-ietf-httpbis-semantics-19].
    
Available Formats

CSV
Field Name Template Status Reference Comments
A-IM permanent [RFC4229]
Accept permanent [RFC-ietf-httpbis-semantics-19, Section 12.5.1]
Accept-Additions permanent [RFC4229]
Accept-CH permanent [RFC8942, Section 3.1]
Accept-Charset deprecated [RFC-ietf-httpbis-semantics-19, Section 12.5.2]
Accept-Datetime permanent [RFC7089]
Accept-Encoding permanent [RFC-ietf-httpbis-semantics-19, Section 12.5.3]
Accept-Features permanent [RFC4229]
Accept-Language permanent [RFC-ietf-httpbis-semantics-19, Section 12.5.4]
Accept-Patch provisional [RFC5789]
Accept-Post perm/accept-post permanent [https://www.w3.org/TR/ldp/]
Accept-Ranges permanent [RFC-ietf-httpbis-semantics-19, Section 14.3]
Access-Control prov/access-control deprecated [W3C Web Application Formats Working Group]
Access-Control-Allow-Credentials prov/access-control-allow-credentials provisional [W3C Web Application Formats Working Group]
Access-Control-Allow-Headers prov/access-control-allow-headers provisional [W3C Web Application Formats Working Group]
Access-Control-Allow-Methods prov/access-control-allow-methods provisional [W3C Web Application Formats Working Group]
Access-Control-Allow-Origin prov/access-control-allow-origin provisional [W3C Web Application Formats Working Group]
Access-Control-Max-Age prov/access-control-max-age provisional [W3C Web Application Formats Working Group]
Access-Control-Request-Headers prov/access-control-request-headers provisional [W3C Web Application Formats Working Group]
Access-Control-Request-Method prov/access-control-request-method provisional [W3C Web Application Formats Working Group]
Age permanent [RFC-ietf-httpbis-cache-19, Section 5.1]
Allow permanent [RFC-ietf-httpbis-semantics-19, Section 10.2.1]
ALPN permanent [RFC7639, Section 2]
Alt-Svc permanent [RFC7838]
Alt-Used permanent [RFC7838]
Alternates permanent [RFC4229]
AMP-Cache-Transform provisional [https://github.com/ampproject/amphtml/blob/master/spec/amp-cache-transform.md]
Apply-To-Redirect-Ref permanent [RFC4437]
Authentication-Control permanent [RFC8053, Section 4]
Authentication-Info permanent [RFC-ietf-httpbis-semantics-19, Section 11.6.3]
Authorization permanent [RFC-ietf-httpbis-semantics-19, Section 11.6.2]
C-Ext permanent [RFC4229]
C-Man permanent [RFC4229]
C-Opt permanent [RFC4229]
C-PEP permanent [RFC4229]
C-PEP-Info deprecated [RFC4229]
Cache-Control permanent [RFC-ietf-httpbis-cache-19, Section 5.2]
Cache-Status permanent [RFC-ietf-httpbis-cache-header-10]
Cal-Managed-ID permanent [RFC8607, Section 5.1]
CalDAV-Timezones permanent [RFC7809, Section 7.1]
CDN-Loop permanent [RFC8586]
Cert-Not-After permanent [RFC8739, Section 3.3]
Cert-Not-Before permanent [RFC8739, Section 3.3]
Close permanent [RFC-ietf-httpbis-messaging-19, Section 9.6] (reserved)
Compliance provisional [RFC4229]
Connection permanent [RFC-ietf-httpbis-semantics-19, Section 7.6.1]
Content-Base obsoleted [RFC2068][RFC2616]
Content-Disposition permanent [RFC6266]
Content-Encoding permanent [RFC-ietf-httpbis-semantics-19, Section 8.4]
Content-ID permanent [RFC4229]
Content-Language permanent [RFC-ietf-httpbis-semantics-19, Section 8.5]
Content-Length permanent [RFC-ietf-httpbis-semantics-19, Section 8.6]
Content-Location permanent [RFC-ietf-httpbis-semantics-19, Section 8.7]
Content-MD5 obsoleted [RFC2616, Section 14.15][RFC7231, Appendix B]
Content-Range permanent [RFC-ietf-httpbis-semantics-19, Section 14.4]
Content-Script-Type permanent [RFC4229]
Content-Style-Type permanent [RFC4229]
Content-Transfer-Encoding provisional [RFC4229]
Content-Type permanent [RFC-ietf-httpbis-semantics-19, Section 8.3]
Content-Version permanent [RFC4229]
Cookie permanent [RFC6265]
Cookie2 obsoleted [RFC2965][RFC6265]
Cost provisional [RFC4229]
DASL permanent [RFC5323]
Date permanent [RFC-ietf-httpbis-semantics-19, Section 6.6.1]
DAV permanent [RFC4918]
Default-Style permanent [RFC4229]
Delta-Base permanent [RFC4229]
Depth permanent [RFC4918]
Derived-From permanent [RFC4229]
Destination permanent [RFC4918]
Differential-ID permanent [RFC4229]
Digest permanent [RFC4229]
Early-Data permanent [RFC8470]
EDIINT-Features provisional [RFC6017]
ETag permanent [RFC-ietf-httpbis-semantics-19, Section 8.8.3]
Expect permanent [RFC-ietf-httpbis-semantics-19, Section 10.1.1]
Expect-CT permanent [RFC-ietf-httpbis-expect-ct-08]
Expires permanent [RFC-ietf-httpbis-cache-19, Section 5.3]
Ext permanent [RFC4229]
Forwarded permanent [RFC7239]
From permanent [RFC-ietf-httpbis-semantics-19, Section 10.1.2]
GetProfile permanent [RFC4229]
Hobareg permanent [RFC7486, Section 6.1.1]
Host permanent [RFC-ietf-httpbis-semantics-19, Section 7.2]
HTTP2-Settings permanent [RFC7540, Section 3.2.1]
If permanent [RFC4918]
If-Match permanent [RFC-ietf-httpbis-semantics-19, Section 13.1.1]
If-Modified-Since permanent [RFC-ietf-httpbis-semantics-19, Section 13.1.3]
If-None-Match permanent [RFC-ietf-httpbis-semantics-19, Section 13.1.2]
If-Range permanent [RFC-ietf-httpbis-semantics-19, Section 13.1.5]
If-Schedule-Tag-Match permanent [RFC6638]
If-Unmodified-Since permanent [RFC-ietf-httpbis-semantics-19, Section 13.1.4]
IM permanent [RFC4229]
Include-Referred-Token-Binding-ID permanent [RFC8473]
Isolation prov/isolation provisional [OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign]
Keep-Alive permanent [RFC4229]
Label permanent [RFC4229]
Last-Modified permanent [RFC-ietf-httpbis-semantics-19, Section 8.8.2]
Link permanent [RFC8288]
Location permanent [RFC-ietf-httpbis-semantics-19, Section 10.2.2]
Lock-Token permanent [RFC4918]
Man permanent [RFC4229]
Max-Forwards permanent [RFC-ietf-httpbis-semantics-19, Section 7.6.2]
Memento-Datetime permanent [RFC7089]
Message-ID provisional [RFC4229]
Meter permanent [RFC4229]
Method-Check prov/method-check deprecated [W3C Web Application Formats Working Group]
Method-Check-Expires prov/method-check-expires deprecated [W3C Web Application Formats Working Group]
MIME-Version permanent [RFC-ietf-httpbis-messaging-19, Appendix B.1]
Negotiate permanent [RFC4229]
Non-Compliance provisional [RFC4229]
OData-EntityId perm/odata-entityid permanent [OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign]
OData-Isolation perm/odata-isolation permanent [OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign]
OData-MaxVersion perm/odata-maxversion permanent [OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign]
OData-Version perm/odata-version permanent [OData Version 4.01 Part 1: Protocol][OASIS][Chet_Ensign]
Opt permanent [RFC4229]
Optional provisional [RFC4229]
Optional-WWW-Authenticate permanent [RFC8053, Section 3]
Ordering-Type permanent [RFC4229]
Origin permanent [RFC6454]
OSCORE permanent [RFC8613, Section 11.1]
OSLC-Core-Version prov/oslc-core-version provisional [OASIS Project Specification 01][OASIS][Chet_Ensign]
Overwrite permanent [RFC4918]
P3P permanent [RFC4229]
PEP permanent [RFC4229]
Pep-Info permanent [RFC4229]
PICS-Label permanent [RFC4229]
Position permanent [RFC4229]
Pragma permanent [RFC-ietf-httpbis-cache-19, Section 5.4]
Prefer permanent [RFC7240]
Preference-Applied permanent [RFC7240]
ProfileObject permanent [RFC4229]
Protocol permanent [RFC4229]
Protocol-Info deprecated [RFC4229]
Protocol-Query deprecated [RFC4229]
Protocol-Request permanent [RFC4229]
Proxy-Authenticate permanent [RFC-ietf-httpbis-semantics-19, Section 11.7.1]
Proxy-Authentication-Info permanent [RFC-ietf-httpbis-semantics-19, Section 11.7.3]
Proxy-Authorization permanent [RFC-ietf-httpbis-semantics-19, Section 11.7.2]
Proxy-Features permanent [RFC4229]
Proxy-Instruction permanent [RFC4229]
Proxy-Status permanent [RFC-ietf-httpbis-proxy-status-08]
Public permanent [RFC4229]
Public-Key-Pins permanent [RFC7469]
Public-Key-Pins-Report-Only permanent [RFC7469]
Range permanent [RFC-ietf-httpbis-semantics-19, Section 14.2]
Redirect-Ref permanent [RFC4437]
Referer permanent [RFC-ietf-httpbis-semantics-19, Section 10.1.3]
Referer-Root prov/referer-root deprecated [W3C Web Application Formats Working Group]
Repeatability-Client-ID prov/repeatability-client-id provisional [Repeatable Requests Version 1.0][OASIS][Chet_Ensign]
Repeatability-First-Sent prov/repeatability-first-sent provisional [Repeatable Requests Version 1.0][OASIS][Chet_Ensign]
Repeatability-Request-ID prov/repeatability-request-id provisional [Repeatable Requests Version 1.0][OASIS][Chet_Ensign]
Repeatability-Result prov/repeatability-result provisional [Repeatable Requests Version 1.0][OASIS][Chet_Ensign]
Replay-Nonce permanent [RFC8555, Section 6.5.1]
Resolution-Hint provisional [RFC4229]
Resolver-Location provisional [RFC4229]
Retry-After permanent [RFC-ietf-httpbis-semantics-19, Section 10.2.3]
Safe permanent [RFC4229]
Schedule-Reply permanent [RFC6638]
Schedule-Tag permanent [RFC6638]
Sec-Token-Binding permanent [RFC8473]
Sec-WebSocket-Accept permanent [RFC6455]
Sec-WebSocket-Extensions permanent [RFC6455]
Sec-WebSocket-Key permanent [RFC6455]
Sec-WebSocket-Protocol permanent [RFC6455]
Sec-WebSocket-Version permanent [RFC6455]
Security-Scheme permanent [RFC4229]
Server permanent [RFC-ietf-httpbis-semantics-19, Section 10.2.4]
Set-Cookie permanent [RFC6265]
Set-Cookie2 obsoleted [RFC2965][RFC6265]
SetProfile permanent [RFC4229]
SLUG permanent [RFC5023]
SoapAction permanent [RFC4229]
Status-URI permanent [RFC4229]
Strict-Transport-Security permanent [RFC6797]
SubOK provisional [RFC4229]
Subst provisional [RFC4229]
Sunset permanent [RFC8594]
Surrogate-Capability permanent [RFC4229]
Surrogate-Control permanent [RFC4229]
TCN permanent [RFC4229]
TE permanent [RFC-ietf-httpbis-semantics-19, Section 10.1.4]
Timeout permanent [RFC4918]
Timing-Allow-Origin prov/timing-allow-origin provisional [https://www.w3.org/TR/resource-timing-1/#timing-allow-origin]
Title provisional [RFC4229]
Topic permanent [RFC8030, Section 5.4]
Traceparent prov/traceparent provisional [https://www.w3.org/TR/trace-context/#traceparent-field]
Tracestate prov/tracestate provisional [https://www.w3.org/TR/trace-context/#tracestate-field]
Trailer permanent [RFC-ietf-httpbis-semantics-19, Section 6.6.2]
Transfer-Encoding permanent [RFC-ietf-httpbis-messaging-19, Section 6.1]
TTL permanent [RFC8030, Section 5.2]
UA-Color provisional [RFC4229]
UA-Media provisional [RFC4229]
UA-Pixels provisional [RFC4229]
UA-Resolution provisional [RFC4229]
UA-Windowpixels provisional [RFC4229]
Upgrade permanent [RFC-ietf-httpbis-semantics-19, Section 7.8]
Urgency permanent [RFC8030, Section 5.3]
URI permanent [RFC4229]
User-Agent permanent [RFC-ietf-httpbis-semantics-19, Section 10.1.5]
Variant-Vary permanent [RFC4229]
Vary permanent [RFC-ietf-httpbis-semantics-19, Section 12.5.5]
Version provisional [RFC4229]
Via permanent [RFC-ietf-httpbis-semantics-19, Section 7.6.3]
Want-Digest permanent [RFC4229]
Warning obsoleted [RFC-ietf-httpbis-cache-19, Section 5.5]
WWW-Authenticate permanent [RFC-ietf-httpbis-semantics-19, Section 11.6.1]
X-Content-Type-Options permanent [https://fetch.spec.whatwg.org/#x-content-type-options-header]
X-Device-Accept prov/x-device-accept provisional [W3C Mobile Web Best Practices Working Group]
X-Device-Accept-Charset prov/x-device-accept-charset provisional [W3C Mobile Web Best Practices Working Group]
X-Device-Accept-Encoding prov/x-device-accept-encoding provisional [W3C Mobile Web Best Practices Working Group]
X-Device-Accept-Language prov/x-device-accept-language provisional [W3C Mobile Web Best Practices Working Group]
X-Device-User-Agent prov/x-device-user-agent provisional [W3C Mobile Web Best Practices Working Group]
X-Frame-Options permanent [RFC7034]
* permanent [RFC-ietf-httpbis-semantics-19, Section 12.5.5] (reserved)

Contact Information

ID Name Contact URI Last Updated
[Chet_Ensign] Chet Ensign mailto:chet.ensign&oasis-open.org 2020-09-01
[OASIS] OASIS https://www.oasis-open.org