Internet Assigned Numbers Authority

Well-Known URIs

Created
2010-01-20
Last Updated
2024-03-18
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Registry included below

Well-Known URIs

Registration Procedure(s)
Specification Required
Expert(s)
Mark Nottingham
Reference
[RFC8615]
Note
New link relations, along with changes to existing relations, can be requested 
using the [registry interface] or the mailing list defined in [RFC8615].
    
Available Formats

CSV
URI Suffix Change Controller Reference Status Related Information Date Registered Date Modified
acme-challenge IETF [RFC8555, Section 8.3] permanent 2016-08-18
amphtml AMP Project (OpenJS Foundation) [https://developers.google.com/amp/cache/update-cache] provisional 2020-07-06
appspecific [Bruce_Leban] [https://github.com/Vroo/well-known-uri-appspecific/blob/main/well-known-uri-for-application-specific-purposes.txt] provisional 2021-06-01
ashrae [ASHRAE] [http://www.bacnet.org/Addenda/Add-135-2012am-ppr3-draft-17_chair_approved.pdf] permanent 2016-01-22
assetlinks.json [Google_Inc.] [https://github.com/google/digitalassetlinks/blob/master/well-known/specification.md] permanent [https://github.com/google/digitalassetlinks/blob/master/well-known/details.md] 2015-09-28
brski IETF [RFC8995] permanent BRSKI has a registry at [https://www.iana.org/assignments/brski-parameters/brski-parameters.xhtml#brski-well-known-uris] 2020-10-09
caldav IETF [RFC6764] permanent see also [RFC4791]
carddav IETF [RFC6764] permanent see also [RFC6352]
change-password W3C [https://w3c.github.io/webappsec-change-password-url/#the-change-password-well-known-uri] provisional 2023-03-13
cmp IETF [RFC9480][RFC9482] permanent CMP has a registry at [https://www.iana.org/assignments/cmp] 2021-05-20 2023-05-31
coap IETF [RFC8323] permanent 2017-12-22
core IETF [RFC6690] permanent
csaf [OASIS_Open] [Common Security Advisory Framework Version 2.0, OASIS Standard] provisional 2023-02-10
csaf-aggregator [OASIS_Open] [Common Security Advisory Framework Version 2.0, OASIS Standard] provisional 2023-02-10
csvm W3C [https://www.w3.org/TR/tabular-data-model/#default-locations-and-site-wide-location-configuration] permanent 2015-09-28
did.json [Credentials_Community_Group] [https://w3c-ccg.github.io/did-method-web] provisional 2023-01-31
did-configuration.json [Claims_and_Credentials_WG] [https://identity.foundation/.well-known/resources/did-configuration] provisional 2023-01-31
dnt [W3C_Tracking_Protection_WG] [http://www.w3.org/TR/tracking-dnt/#status-resource] permanent 2015-08-19
dnt-policy.txt Electronic Frontier Foundation [https://www.eff.org/dnt-policy] permanent 2015-08-19
dots IETF [RFC9132] permanent 2020-01-16 2021-06-11
ecips [Wei_Tang] [https://ecips.that.world/24-ECIPURI] provisional 2019-04-10
edhoc IETF [RFC-ietf-lake-edhoc-22] permanent 2023-08-29
enterprise-network-security [ETSI_TC_CYBER] [ETSI TS 103 523-5 clause 4.3.4.3.4.2] permanent 2022-02-07
enterprise-transport-security [ETSI_TC_CYBER] [ETSI TS 103 523-3 clause 4.3.8.3] permanent 2019-05-14
est IETF [RFC7030][RFC9148] permanent 2013-08-16 2020-04-29
genid W3C [RDF 1.1 Concepts and Abstract Syntax] permanent 2012-11-15
gpc.json [Global_Privacy_Control_project] [https://globalprivacycontrol.github.io/gpc-spec/] provisional 2022-01-28
gs1resolver [GS1] [GS1 Digital Link, Section 7.11] permanent 2020-05-18
hoba IETF [RFC7486, Section 6] permanent 2015-01-20
host-meta IETF [RFC6415] permanent The "host-meta" documents obtained from the same host using the HTTP and HTTPS protocols (using default ports) MUST be identical.
host-meta.json IETF [RFC6415] permanent The "host-meta.json" documents obtained from the same host using the HTTP and HTTPS protocols (using default ports) MUST be identical.
hosting-provider [Automattic_Inc.] [https://github.com/Automattic/hosting-provider] provisional 2020-07-21
http-opportunistic IETF [RFC8164, Section 2.3][status-change-http-experiments-to-historic] obsoleted 2017-03-20 2021-12-28
idp-proxy IETF [RFC8827] permanent 2019-07-25
jmap IETF [RFC8620, Section 2.2] permanent 2019-03-28
keybase.txt [The_Keybase_Project] [https://keybase.io/__/keybase_well_known] permanent Related information: Documentation for the Keybase [command line] and [API]. 2014-04-08
knx [KNX_Association] [https://knxcloud.org/index.php/s/jdZXpCC3EolQgH2/download] provisional 2023-08-15
looking-glass [M._Stubbig] [RFC8522, Section 2] permanent 2018-12-07
masque IETF [RFC9298][RFC9484] permanent For sub-suffix allocations, see the registry at [https://www.iana.org/assignments/masque]. 2022-06-23 2023-05-16
matrix [The_Matrix.org_Foundation_C.I.C.] [https://spec.matrix.org/latest/client-server-api/#well-known-uri][https://spec.matrix.org/latest/server-server-api/#getwell-knownmatrixserver] permanent 2019-04-16 2023-06-20
mercure [Les-Tilleuls.coop] [https://mercure.rocks/spec] provisional 2023-03-20
mta-sts.txt IETF [RFC8461] permanent 2018-06-21
mud obsoleted 2016-11-23 2021-12-28
nfv-oauth-server-configuration [ETSI] [ETSI GS NFV-SEC 022 V2.7.1] permanent 2019-06-26 2020-01-22
ni IETF [RFC6920] permanent
nostr.json [Nostr_Developer_Community] [https://github.com/nostr-protocol/nips/blob/master/05.md] provisional 2024-03-18
oauth-authorization-server IESG [RFC8414, Section 3] permanent 2018-03-27
ohttp-gateway IETF [RFC9540] permanent 2023-10-25
open-resource-discovery [SAP_SE] [https://sap.github.io/open-resource-discovery/] provisional 2023-11-27
openid-configuration [OpenID_Foundation_Artifact_Binding_Working_Group] [http://openid.net/specs/openid-connect-discovery-1_0.html] permanent 2013-08-27
openorg [cjg_at_ecs.soton.ac.uk] [http://opd.data.ac.uk/] permanent 2015-05-29
oslc [OASIS] [https://docs.oasis-open-projects.org/oslc-op/core/v3.0/ps01/oslc-core.html] permanent 2020-12-29
pki-validation [CA_Browser_Forum] [Section 3.2.2.4.6 of version 1.3.8 of the CA/Browser Forum’s Baseline Requirements Certificate Policy for the Issuance and Management of Publicly-Trusted Certificates (“Baseline Requirements”)] permanent See also [https://cabforum.org/baseline-requirements-documents/] 2017-02-06
posh IETF [RFC7711] permanent The suffix "posh" is expected to be followed by an additional path component consisting of a service name (say, "spice") and a file extension of ".json", resulting in a full path of, for instance, "/.well-known/posh/spice.json". Registration of service names shall be requested by developers of the relevant application protocols. 2015-09-20
private-token-issuer-directory IETF [RFC-ietf-privacypass-protocol-16] permanent 2023-10-09
probing.txt IETF [RFC9511] permanent 2023-09-01
pvd IETF [RFC8801] permanent 2020-02-18
rd IETF [RFC9176] permanent 2021-05-04
related-website-set.json [Google_Inc.] [https://github.com/GoogleChrome/related-website-sets/blob/main/Well-Known-Specification.md] provisional 2023-12-01
reload-config IETF [RFC6940] permanent
repute-template IETF [RFC7072] permanent 2013-09-30
resourcesync [NISO] [http://www.openarchives.org/rs/resourcesync] permanent 2017-05-26
sbom IETF [RFC9472] permanent See ISO/IEC 5962:2021 and SPDX.org 2023-05-12
security.txt IETF [RFC9116] permanent 2021-07-13
sshfp [Cynthia_Revström] [https://sshfp.github.io/sshfp.html] provisional 2020-07-21
stun-key IETF [RFC7635] permanent 2015-06-12
thread [Thread_Group_Inc.] [https://www.threadgroup.org/support#specifications] permanent 2018-11-29
time [Poul-Henning_Kamp] [http://phk.freebsd.dk/time/20151129/] permanent 2015-12-09
timezone IESG [RFC7808] permanent 2015-08-03
tdmrep.json W3C [https://www.w3.org/2022/tdmrep/] provisional 2024-02-15
tor-relay [Tor_Project_Development_Mailing_List] [The "tor-relay" Well-Known Resource Identifier] provisional 2020-10-06
traffic-advice [Jeremy_Roman] [https://buettner.github.io/private-prefetch-proxy/traffic-advice.html] provisional 2022-03-29
trust.txt JournalList.net [https://journallist.net/reference-document-for-trust-txt-specifications] provisional 2022-02-04
uma2-configuration [Kantara_UMA_WG] [UMA 2.0 Grant for OAuth 2.0, Section 2] permanent 2017-06-20
void W3C [http://www.w3.org/TR/void] permanent 2011-05-11
webfinger IETF [RFC7033] permanent The query to the WebFinger resource will include one or more parameters in the query string; see Section 4.1 of [RFC7033]. Resources at this location are able to return a JSON Resource Descriptor (JRD) as described in Section 4.4 of [RFC7033]. 2013-03-15 2013-09-06
webweaver.json [DigiOnline_GmbH] [https://www.webweaver.de/well-known] provisional 2022-08-11
wot [W3C_WoT_WG] [https://www.w3.org/TR/wot-discovery/#introduction-well-known] permanent 2023-01-24

Contact Information

ID Name Contact URI Last Updated
[ASHRAE] American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE) http://www.ashrae.org 2016-01-22
[Automattic_Inc.] Automattic Inc. https://automattic.com 2020-07-21
[Bruce_Leban] Bruce Leban mailto:bruce&leban.us 2021-06-01
[CA_Browser_Forum] CA/Browser Forum mailto:questions&cabforum.org
https://www.cabforum.org
2017-02-06
[cjg_at_ecs.soton.ac.uk] Christopher Gutteridge mailto:cjg&ecs.soton.ac.uk 2015-05-29
[Claims_and_Credentials_WG] Claims and Credentials WG mailto:cc-wg&lists.identity.foundation 2023-01-31
[Credentials_Community_Group] Credentials Community Group mailto:public-credentials&w3.org 2023-01-31
[Cynthia_Revström] Cynthia Revström mailto:d6035904-6d06-4ef2-861b-81090738b440&email.cynthia.re 2020-07-21
[DigiOnline_GmbH] DigiOnline GmbH https://www.digionline.de 2022-08-11
[ETSI] ETSI mailto:pnns&etsi.org 2019-06-26
[ETSI_TC_CYBER] ETSI (TC CYBER) mailto:cybersupport&etsi.org 2022-02-07
[Global_Privacy_Control_project] Global Privacy Control project https://globalprivacycontrol.org 2022-01-28
[Google_Inc.] Google Inc. mailto:well-known-statements&google.com 2015-09-28
[GS1] GS1 mailto:phil.archer&gs1.org 2020-05-18
[Jeremy_Roman] Jeremy Roman mailto:jbroman&chromium.org 2022-03-29
[Kantara_UMA_WG] Kantara Initiative User-Managed Access Work Group mailto:staff&kantarainitiative.org 2017-06-29
[KNX_Association] KNX Association mailto:joost.demarest&knx.org 2023-08-15
[Les-Tilleuls.coop] Les-Tilleuls.coop https://les-tilleuls.coop 2023-03-20
[M._Stubbig] Markus Stubbig mailto:stubbig.ietf&gmail.com 2018-12-07
[NISO] National Information Standardization Organization (NISO) mailto:nisohq&niso.org 2017-05-26
[Nostr_Developer_Community] Nostr Developer Community https://dev.to/t/nostr 2024-03-18
[OASIS] OASIS https://www.oasis-open.org/ 2020-12-29
[OASIS_Open] OASIS Open mailto:project-admin&oasis-open.org 2023-02-10
[OpenID_Foundation_Artifact_Binding_Working_Group] OpenID Foundation Artifact Binding Working Group mailto:openid-specs-ab&lists.openid.net 2013-08-27
[Poul-Henning_Kamp] Poul-Henning Kamp mailto:phk&phk.freebsd.dk 2019-05-24
[SAP_SE] SAP SE mailto:ospo&sap.com 2023-11-27
[The_Keybase_Project] The Keybase Project https://keybase.io/ 2014-04-08
[The_Matrix.org_Foundation_C.I.C.] The Matrix.org Foundation C.I.C. https://matrix.org 2019-04-16
[Thread_Group_Inc.] Thread Group, Inc. mailto:help&threadgroup.org 2018-11-29
[Tor_Project_Development_Mailing_List] Tor Project Development Mailing List mailto:tor-dev&lists.torproject.org 2020-10-20
[W3C_Tracking_Protection_WG] W3C Tracking Protection WG http://www.w3.org/2011/tracking-protection/ 2015-08-19
[W3C_WoT_WG] W3C WoT WG mailto:team-wot&w3.org 2023-01-24
[Wei_Tang] Wei Tang mailto:hi&that.world 2019-04-10