Internet Assigned Numbers Authority
??Domains
??Protocols
??Numbers
??About
Well-Known URIs
Created
2010-01-20
Last Updated
2025-09-29
Available Formats
[IMG]
XML [IMG]
HTML [IMG]
Plain text
Registry Included Below
??Well-Known URIs
Well-Known URIs
Registration Procedure(s)
Specification Required
Expert(s)
Mark Nottingham
Reference
[RFC8615]
Note
New well-known URI registrations, along with changes to existing registrations, can be requested
using the [registry interface] or the mailing list defined in [RFC8615].
Available Formats
[IMG]
CSV
URI Suffix Reference Status Change Controller Related Information Date Date
Registered Modified
acme-challenge [RFC8555, Section 8.3] permanent IETF 2016-08-18
agent-card.json [https://a2aproject.github.io/A2A/latest/specification/] permanent Linux Foundation 2025-08-01
amphtml [https://developers.google.com/amp/cache/update-cache] provisional AMP Project (OpenJS Foundation) 2020-07-06
api-catalog [RFC9727] permanent IETF 2024-12-23
appspecific [https://github.com/Vroo/well-known-uri-appspecific/blob/main/well-known-uri-for-application-specific-purposes.txt] provisional [Bruce_Leban] 2021-06-01
ashrae [http://www.bacnet.org/Addenda/Add-135-2012am-ppr3-draft-17_chair_approved.pdf] permanent [ASHRAE] 2016-01-22
assetlinks.json [https://github.com/google/digitalassetlinks/blob/master/well-known/specification.md] permanent [Google_Inc.] [https://github.com/google/digitalassetlinks/blob/master/well-known/details.md] 2015-09-28
broadband-labels [https://www.bitag.org/BITAG-BB-Labels.pdf] provisional [BITAG] 2024-08-30
brski [RFC8995] permanent IETF BRSKI has a registry at 2020-10-09
[https://www.iana.org/assignments/brski-parameters/brski-parameters.xhtml#brski-well-known-uris]
caldav [RFC6764] permanent IETF see also [RFC4791]
carddav [RFC6764] permanent IETF see also [RFC6352]
change-password [https://w3c.github.io/webappsec-change-password-url/#the-change-password-well-known-uri] provisional W3C 2023-03-13
cmp [RFC9811][RFC9482] permanent IETF CMP has a registry at [https://www.iana.org/assignments/cmp] 2021-05-20 2025-01-14
coap [RFC8323] permanent IETF 2017-12-22
coap-eap [RFC9820] permanent IETF 2025-02-14
core [RFC6690] permanent IETF
csaf [Common Security Advisory Framework Version 2.0, OASIS Standard] provisional [OASIS_Open] 2023-02-10
csaf-aggregator [Common Security Advisory Framework Version 2.0, OASIS Standard] provisional [OASIS_Open] 2023-02-10
csvm [https://www.w3.org/TR/tabular-data-model/#default-locations-and-site-wide-location-configuration] permanent W3C 2015-09-28
did.json [https://w3c-ccg.github.io/did-method-web] provisional [Credentials_Community_Group] 2023-01-31
did-configuration.json [https://identity.foundation/.well-known/resources/did-configuration] provisional [Claims_and_Credentials_WG] 2023-01-31
dnt [http://www.w3.org/TR/tracking-dnt/#status-resource] permanent [W3C_Tracking_Protection_WG] 2015-08-19
dnt-policy.txt [https://www.eff.org/dnt-policy] permanent Electronic Frontier Foundation 2015-08-19
dots [RFC9132] permanent IETF 2020-01-16 2021-06-11
easy-proxy [https://github.com/bytedance/g3/blob/master/doc/easy-proxy.md] provisional [The_G3_Project] 2025-05-01
ecips [https://ecips.that.world/24-ECIPURI] provisional [Wei_Tang] 2019-04-10
edhoc [RFC9528] permanent IETF 2023-08-29
enterprise-network-security [ETSI TS 103 523-5 clause 4.3.4.3.4.2] permanent [ETSI_TC_CYBER] 2022-02-07
enterprise-transport-security [ETSI TS 103 523-3 clause 4.3.8.3] permanent [ETSI_TC_CYBER] 2019-05-14
est [RFC7030][RFC9148] permanent IETF 2013-08-16 2020-04-29
funding-manifest-urls [https://fundingjson.org/] provisional [info_at_floss.fund] 2025-04-02
genid [RDF 1.1 Concepts and Abstract Syntax] permanent W3C 2012-11-15
gnap-as-rs [RFC9767, Section 3.1] permanent IETF 2024-10-23
gpc.json [https://globalprivacycontrol.github.io/gpc-spec/] provisional [Global_Privacy_Control_project] 2022-01-28
gs1resolver [GS1 Digital Link, Section 7.11] permanent [GS1] 2020-05-18
hoba [RFC7486, Section 6] permanent IETF 2015-01-20
host-meta [RFC6415] permanent IETF The "host-meta" documents obtained from the same host using the HTTP and HTTPS protocols (using
default ports) MUST be identical.
host-meta.json [RFC6415] permanent IETF The "host-meta.json" documents obtained from the same host using the HTTP and HTTPS protocols
(using default ports) MUST be identical.
hosting-provider [https://github.com/Automattic/hosting-provider] provisional [Automattic_Inc.] 2020-07-21
http-opportunistic [RFC8164, Section 2.3][Status change of HTTP experiments to Historic] obsoleted IETF 2017-03-20 2021-12-28
idp-proxy [RFC8827] permanent IETF 2019-07-25
jmap [RFC8620, Section 2.2] permanent IETF 2019-03-28
keybase.txt [https://keybase.io/__/keybase_well_known] permanent [The_Keybase_Project] Related information: Documentation for the Keybase [command line] and [API]. 2014-04-08
knx [https://knxcloud.org/index.php/s/jdZXpCC3EolQgH2/download] provisional [KNX_Association] 2023-08-15
looking-glass [RFC8522, Section 2] permanent [M._Stubbig] 2018-12-07
masque [RFC9298][RFC9484] permanent IETF For sub-suffix allocations, see the registry at [https://www.iana.org/assignments/masque]. 2022-06-23 2023-05-16
matrix [https://spec.matrix.org/latest/client-server-api/#well-known-uri][https://spec.matrix.org/latest/server-server-api/#getwell-knownmatrixserver] permanent [The_Matrix.org_Foundation_C.I.C.] 2019-04-16 2023-06-20
mercure [https://mercure.rocks/spec] provisional [Les-Tilleuls.coop] 2023-03-20
mta-sts.txt [RFC8461] permanent IETF 2018-06-21
mud obsoleted 2016-11-23 2021-12-28
nfv-oauth-server-configuration [ETSI GS NFV-SEC 022 V2.7.1] permanent [ETSI] 2019-06-26 2020-01-22
ni [RFC6920] permanent IETF
nodeinfo [https://nodeinfo.diaspora.software/] provisional [NodeInfo_Developer_Community] 2024-07-29
nostr.json [https://github.com/nostr-protocol/nips/blob/master/05.md] provisional [Nostr_Developer_Community] 2024-03-18
oauth-authorization-server [RFC8414, Section 3] permanent IESG 2018-03-27
oauth-protected-resource [RFC9728, Section 3] permanent IETF 2024-10-22
ohttp-gateway [RFC9540] permanent IETF 2023-10-25
openid-federation [Section 9 of OpenID Federation 1.0] provisional [OpenID_Foundation_Artifact_Binding_Working_Group] 2024-07-26
open-resource-discovery [https://sap.github.io/open-resource-discovery/] provisional [SAP_SE] 2023-11-27
openid-configuration [http://openid.net/specs/openid-connect-discovery-1_0.html] permanent [OpenID_Foundation_Artifact_Binding_Working_Group] 2013-08-27
openorg [http://opd.data.ac.uk/] permanent [cjg_at_ecs.soton.ac.uk] 2015-05-29
oslc [https://docs.oasis-open-projects.org/oslc-op/core/v3.0/ps01/oslc-core.html] permanent [OASIS] 2020-12-29
pki-validation [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 permanent [CA_Browser_Forum] See also [https://cabforum.org/baseline-requirements-documents/] 2017-02-06
Publicly-Trusted Certificates (¡°Baseline Requirements¡±)]
The suffix "posh" is expected to be followed by an additional path component consisting of a
posh [RFC7711] permanent IETF service name (say, "spice") and a file extension of ".json", resulting in a full path of, for 2015-09-20
instance, "/.well-known/posh/spice.json". Registration of service names shall be requested by
developers of the relevant application protocols.
privacy-sandbox-attestations.json [https://github.com/privacysandbox/attestation] provisional [Google_Inc.] 2024-12-04
private-token-issuer-directory [RFC9578] permanent IETF 2023-10-09
probing.txt [RFC9511] permanent IETF 2023-09-01
pvd [RFC8801] permanent IETF 2020-02-18
rd [RFC9176] permanent IETF 2021-05-04
related-website-set.json [https://github.com/GoogleChrome/related-website-sets/blob/main/Well-Known-Specification.md] provisional [Google_Inc.] 2023-12-01
reload-config [RFC6940] permanent IETF
repute-template [RFC7072] permanent IETF 2013-09-30
resourcesync [http://www.openarchives.org/rs/resourcesync] permanent [NISO] 2017-05-26
sbom [RFC9472] permanent IETF See ISO/IEC 5962:2021 and SPDX.org 2023-05-12
security.txt [RFC9116] permanent IETF 2021-07-13
ssf-configuration [https://openid.net/specs/openid-sharedsignals-framework-1_0-ID2.html] provisional [OpenID_Shared_Signals_Working_Group] 2024-04-18
sshfp [https://sshfp.github.io/sshfp.html] provisional [Cynthia_Revstr?m] 2020-07-21
stun-key [RFC7635] permanent IETF 2015-06-12
terraform.json [https://developer.hashicorp.com/terraform/internals/remote-service-discovery] provisional [HashiCorp_Terraform_Team] 2024-07-01
thread [https://www.threadgroup.org/support#specifications] permanent [Thread_Group_Inc.] 2018-11-29
time [http://phk.freebsd.dk/time/20151129/] permanent [Poul-Henning_Kamp] 2015-12-09
timezone [RFC7808] permanent IESG 2015-08-03
tdmrep.json [https://www.w3.org/2022/tdmrep/] provisional W3C 2024-02-15
tor-relay [The "tor-relay" Well-Known Resource Identifier] provisional [Tor_Project_Development_Mailing_List] 2020-10-06
tpcd [The "tpcd/grace-period.json" Well-Known Resource Identifier] provisional [Google_LLC] [https://github.com/explainers-by-googlers/3pcd-grace-period-opt-out] 2024-05-08
traffic-advice [https://buettner.github.io/private-prefetch-proxy/traffic-advice.html] provisional [Jeremy_Roman] 2022-03-29
trust.txt [https://journallist.net/reference-document-for-trust-txt-specifications] provisional JournalList.net 2022-02-04
uma2-configuration [UMA 2.0 Grant for OAuth 2.0, Section 2] permanent [Kantara_UMA_WG] 2017-06-20
void [http://www.w3.org/TR/void] permanent W3C 2011-05-11
The query to the WebFinger resource will include one or more parameters in the query string; see
webfinger [RFC7033] permanent IETF Section 4.1 of [RFC7033]. Resources at this location are able to return a JSON Resource 2013-03-15 2013-09-06
Descriptor (JRD) as described in Section 4.4 of [RFC7033].
webhook-authorized-senders.json [https://intempus.dk/webhook-authorization] permanent [Intempus_ApS] 2025-09-29
webweaver.json [https://www.webweaver.de/well-known] provisional [DigiOnline_GmbH] 2022-08-11
wot [https://www.w3.org/TR/wot-discovery/#introduction-well-known] permanent [W3C_WoT_WG] 2023-01-24
Contact Information
ID Name Contact URI Last
Updated
American Society of
Heating,
[ASHRAE] Refrigeration, and http://www.ashrae.org 2016-01-22
Air-conditioning
Engineers (ASHRAE)
[Automattic_Inc.] Automattic Inc. https://automattic.com 2020-07-21
Broadband Internet
[BITAG] Technical Advisory https://www.bitag.org 2024-08-30
Group (BITAG)
[Bruce_Leban] Bruce Leban mailto:bruce&leban.us 2021-06-01
[CA_Browser_Forum] CA/Browser Forum mailto:questions&cabforum.org 2017-02-06
https://www.cabforum.org
[cjg_at_ecs.soton.ac.uk] Christopher mailto:cjg&ecs.soton.ac.uk 2015-05-29
Gutteridge
[Claims_and_Credentials_WG] Claims and mailto:cc-wg&lists.identity.foundation 2023-01-31
Credentials WG
[Credentials_Community_Group] Credentials Community mailto:public-credentials&w3.org 2023-01-31
Group
[Cynthia_Revstr?m] Cynthia Revstr?m 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
[The_G3_Project] The G3 Project https://github.com/bytedance/g3 2025-05-01
[Global_Privacy_Control_project] Global Privacy https://globalprivacycontrol.org 2022-01-28
Control project
[Google_Inc.] Google Inc. mailto:well-known-statements&google.com 2015-09-28
[Google_LLC] Google LLC mailto:tpcd-mitigations-team&google.com 2024-05-08
[GS1] GS1 mailto:phil.archer&gs1.org 2020-05-18
[HashiCorp_Terraform_Team] HashiCorp Terraform https://github.com/hashicorp/terraform 2024-07-01
Team
[info_at_floss.fund] info at floss.fund mailto:info&floss.fund 2025-04-02
[Intempus_ApS] Intempus ApS mailto:api&intempus.dk 2025-09-29
[Jeremy_Roman] Jeremy Roman mailto:jbroman&chromium.org 2022-03-29
Kantara Initiative
[Kantara_UMA_WG] User-Managed Access mailto:staff&kantarainitiative.org 2017-06-29
Work Group
[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
National Information
[NISO] Standardization mailto:nisohq&niso.org 2017-05-26
Organization (NISO)
[NodeInfo_Developer_Community] NodeInfo Developer https://nodeinfo.diaspora.software/ 2024-07-29
Community
[Nostr_Developer_Community] Nostr Developer https://dev.to/t/nostr 2024-03-18
Community
[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
[OpenID_Foundation_Artifact_Binding_Working_Group] Artifact Binding mailto:openid-specs-ab&lists.openid.net 2013-08-27
Working Group
OpenID Foundation
[OpenID_Shared_Signals_Working_Group] Shared Signals mailto:openid-specs-risc&lists.openid.net 2024-04-18
Working Group
[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 https://matrix.org 2019-04-16
Foundation C.I.C.
[Thread_Group_Inc.] Thread Group, Inc. mailto:help&threadgroup.org 2018-11-29
Tor Project
[Tor_Project_Development_Mailing_List] Development Mailing mailto:tor-dev&lists.torproject.org 2020-10-20
List
[W3C_Tracking_Protection_WG] W3C Tracking http://www.w3.org/2011/tracking-protection/ 2015-08-19
Protection WG
[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
Licensing Terms
Presently we were in a very dark road, and at a point where it dropped suddenly between steep sides we halted in black shadow. A gleam of pale sand, a whisper of deep flowing waters, and a farther glimmer of more sands beyond them challenged our advance. We had come to a "grapevine ferry." The scow was on the other side, the water too shoal for the horses to swim, and the bottom, most likely, quicksand. Out of the blackness of the opposite shore came a soft, high-pitched, quavering, long-drawn, smothered moan of woe, the call of that snivelling little sinner the screech-owl. Ferry murmured to me to answer it and I sent the same faint horror-stricken tremolo back. Again it came to us, from not farther than one might toss his cap, and I followed Ferry down to the water's edge. The grapevine guy swayed at our side, we heard the scow slide from the sands, and in a few moments, moved by two videttes, it touched our shore. Soon we were across, the two videttes riding with us, and beyond a sharp rise, in an old opening made by the swoop of a hurricane, we entered the silent unlighted bivouac of Ferry's scouts. Ferry got down and sat on the earth talking with Quinn, while the sergeants quietly roused the sleepers to horse. Plotinus is driven by this perplexity to reconsider the whole theory of Matter.477 He takes Aristotle¡¯s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of things¡ªin other words, the sum of their differential characteristics¡ªis their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.478 The general distinction between Matter and Form was originally suggested to Aristotle by Plato¡¯s remarks on the same subject; but he differs325 from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.479 So far, it is a much more positive conception than the ?λη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.480 Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other. The Lawton woman had heard of an officer's family at Grant, which was in need of a cook, and had gone there. [See larger version] On the 8th of July an extraordinary Privy Council was summoned. All the members, of whatever party, were desired to attend, and many were the speculations as to the object of their meeting. The general notion was that it involved the continuing or the ending of the war. It turned out to be for the announcement of the king's intended marriage. The lady selected was Charlotte, the second sister of the Duke of Mecklenburg-Strelitz. Apart from the narrowness of her education, the young princess had a considerable amount of amiability, good sense, and domestic taste. These she shared with her intended husband, and whilst they made the royal couple always retiring, at the same time they caused them to give, during their lives, a moral air to their court. On the 8th of September Charlotte arrived at St. James's, and that afternoon the marriage took place, the ceremony being performed by the Archbishop of Canterbury. On the 22nd the coronation took place with the greatest splendour. Mother and girls were inconsolable, for each had something that they were sure "Si would like," and would "do him good," but they knew Josiah Klegg, Sr., well enough to understand what was the condition when he had once made up his mind. CHAPTER V. THE YOUNG RECRUITS Si proceeded to deftly construct a litter out of the two guns, with some sticks that he cut with a knife, and bound with pawpaw strips. His voice had sunk very low, almost to sweetness. A soft flurry of pink went over her face, and her eyelids drooped. Then suddenly she braced herself, pulled herself taut, grew combative again, though her voice shook. HoME²Ô¾®Ïè̫ʲôÐÇ×ù
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