URI schemes (IANA registry)

Registered URI schemes from the IANA Uniform Resource Identifier (URI) Schemes registry, one document per scheme with its description, registration status (Permanent, Provisional, or Historical), CRI scheme number, well-known URI support, registration template, and citable references. References that name individuals are omitted.

Browse 435 documents Use with your agent

Documents

Showing 49–72 of 435 documents

Document	Version
coap The URI scheme "coap" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
coap+tcp (coap+tcp (see [reviewer notes])) The URI scheme "coap+tcp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "coap+tcp (see [reviewer notes])".	v1
coap+ws (coap+ws (see [reviewer notes])) The URI scheme "coap+ws" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "coap+ws (see [reviewer notes])".	v1
coaps The URI scheme "coaps" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
coaps+tcp (coaps+tcp (see [reviewer notes])) The URI scheme "coaps+tcp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "coaps+tcp (see [reviewer notes])".	v1
coaps+ws (coaps+ws (see [reviewer notes])) The URI scheme "coaps+ws" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "coaps+ws (see [reviewer notes])".	v1
com-eventbrite-attendee The URI scheme "com-eventbrite-attendee" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
content The URI scheme "content" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
content-type The URI scheme "content-type" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
crid (TV-Anytime Content Reference Identifier) The URI scheme "crid" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "TV-Anytime Content Reference Identifier".	v1
cstr The URI scheme "cstr" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
cttps The URI scheme "cttps" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
cvs The URI scheme "cvs" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dab The URI scheme "dab" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dat The URI scheme "dat" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
data The URI scheme "data" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dav The URI scheme "dav" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dhttp (dhttp (see [reviewer notes])) The URI scheme "dhttp" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "dhttp (see [reviewer notes])".	v1
diaspora The URI scheme "diaspora" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dict (dictionary service protocol) The URI scheme "dict" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "dictionary service protocol".	v1
did The URI scheme "did" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dilithium3 The URI scheme "dilithium3" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dis The URI scheme "dis" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
dlna-playcontainer The URI scheme "dlna-playcontainer" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1

Source, review, and usage

Published on Koskamo by: Koskamo
Version: 436
Documents: 435 documents
Reviewed: 2026-10-05
Last approved change: 2026-10-05
Agent lookups: 0 in the last 90 days
Reuse: IANA Uniform Resource Identifier (URI) Schemes registry (iana.org/assignments/uri-schemes); 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: "uri-schemes".

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":"uri-schemes","dataset":"uri-schemes","top_k":3}'

Change history

Every change that reached this dataset. Proposals from contributors land only after Koskamo approves them.

Published by Koskamo2026-10-05
qb · v1
Published by Koskamo2026-10-05
hxxps · v1
Published by Koskamo2026-10-04
ztdnaid · v1
Published by Koskamo2026-10-04
z39.50s (Z39.50 Session) · v1
Published by Koskamo2026-10-04
z39.50r (Z39.50 Retrieval) · v1
Published by Koskamo2026-10-04
z39.50 (Z39.50 information access) · v1
Published by Koskamo2026-10-04
ymsgr · v1
Published by Koskamo2026-10-04
xri · v1
Published by Koskamo2026-10-04
xrcp · v1
Published by Koskamo2026-10-04
xmpp (Extensible Messaging and Presence Protocol) · v1