Well-Known URIs (original) (raw)

acme-challenge

[RFC8555, Section 8.3]

permanent

IETF

2016-08-18

agent-card.json

[https://a2a-protocol.org/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://papers.ssrn.com/sol3/papers.cfm?abstract_id=5681704]

provisional

[BITAG]

2024-08-30

2026-02-25

brski

[RFC8995]

permanent

IETF

BRSKI has a registry at [https://www.iana.org/assignments/brski-parameters/brski-parameters.xhtml#brski-well-known-uris]

2020-10-09

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

[Global Privacy Control (GPC)]

provisional

W3C

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

ic-domains

[https://docs.internetcomputer.org/building-apps/frontends/custom-domains/using-custom-domains#step-2-create-a-file-named-ic-domains-in-your-canister-under-the-well-known-directory-containing-the-custom-domain]

provisional

[DFINITY_Foundation]

2026-01-12

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 Publicly-Trusted Certificates (“Baseline Requirements”)]

permanent

[CA_Browser_Forum]

See also [https://cabforum.org/baseline-requirements-documents/]

2017-02-06

posh

[RFC7711]

permanent

IETF

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

privacy-sandbox-attestations.json

[https://github.com/privacysandbox/attestation]

deprecated

[Google_Inc.]

2024-12-04

2026-04-01

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]

deprecated

[Google_Inc.]

2023-12-01

2026-04-01

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

ssh-known-hosts

[https://c2sp.org/well-known-ssh-hosts]

provisional

[David_Crawshaw]

2025-12-16

sshfp

[https://sshfp.github.io/sshfp.html]

provisional

[Cynthia_Revström]

2020-07-21

stun-key

[RFC7635]

permanent

IETF

2015-06-12

tea

[Transparency Exchange API (coming)]

provisional

[ECMA_International_TC54]

2026-02-28

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]

deprecated

[Google_LLC]

[https://github.com/explainers-by-googlers/3pcd-grace-period-opt-out]

2024-05-08

2026-04-01

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

webauthn

[https://www.w3.org/TR/webauthn-3/#well-known-uri-registration]

permanent

W3C

2026-01-23

webfinger

[RFC7033]

permanent

IETF

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

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