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 265–288 of 435 documents

Document	Version
msrp (Message Session Relay Protocol) The URI scheme "msrp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Message Session Relay Protocol".	v1
msrps (Message Session Relay Protocol Secure) The URI scheme "msrps" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Message Session Relay Protocol Secure".	v1
mss The URI scheme "mss" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
mt (Matter protocol on-boarding payloads that are encoded for use in QR Codes and/or NFC Tags) The URI scheme "mt" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Matter protocol on-boarding payloads that are…	v1
mtqp (Message Tracking Query Protocol) The URI scheme "mtqp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Message Tracking Query Protocol".	v1
mtrust The URI scheme "mtrust" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
mumble The URI scheme "mumble" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
mupdate (Mailbox Update (MUPDATE) Protocol) The URI scheme "mupdate" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Mailbox Update (MUPDATE) Protocol".	v1
musik The URI scheme "musik" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
mvn The URI scheme "mvn" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
mvrp (mvrp (see [reviewer notes])) The URI scheme "mvrp" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "mvrp (see [reviewer notes])".	v1
mvrps (mvrps (see [reviewer notes])) The URI scheme "mvrps" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "mvrps (see [reviewer notes])".	v1
news (USENET news) The URI scheme "news" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "USENET news".	v1
nfs (network file system protocol) The URI scheme "nfs" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "network file system protocol".	v1
ni The URI scheme "ni" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
nih The URI scheme "nih" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
nntp (USENET news using NNTP access) The URI scheme "nntp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "USENET news using NNTP access".	v1
nostr The URI scheme "nostr" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
notes The URI scheme "notes" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
npamp The URI scheme "npamp" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
num (Namespace Utility Modules) The URI scheme "num" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Namespace Utility Modules".	v1
ocf The URI scheme "ocf" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
oid The URI scheme "oid" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.	v1
onenote The URI scheme "onenote" 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