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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 documentsUse with your agent

Documents

Showing 409–432 of 435 documents

DocumentVersion

wasm-js

The URI scheme "wasm-js" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

wcr

The URI scheme "wcr" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

web+ap

The URI scheme "web+ap" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

web+interaction

The URI scheme "web+interaction" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

web3

The URI scheme "web3" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

webcal

The URI scheme "webcal" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

wifi

The URI scheme "wifi" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

wpid

The URI scheme "wpid" is a Historical registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

ws (WebSocket connections)

The URI scheme "ws" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "WebSocket connections".

v1

wss (Encrypted WebSocket connections)

The URI scheme "wss" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Encrypted WebSocket connections".

v1

wtai

The URI scheme "wtai" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

wyciwyg

The URI scheme "wyciwyg" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xcompute

The URI scheme "xcompute" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xcon

The URI scheme "xcon" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xcon-userid

The URI scheme "xcon-userid" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xfire

The URI scheme "xfire" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xftp

The URI scheme "xftp" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xmlrpc.beep

The URI scheme "xmlrpc.beep" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xmlrpc.beeps

The URI scheme "xmlrpc.beeps" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xmpp (Extensible Messaging and Presence Protocol)

The URI scheme "xmpp" is a Permanent registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Extensible Messaging and Presence Protocol".

v1

xrcp

The URI scheme "xrcp" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

xri

The URI scheme "xri" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

ymsgr

The URI scheme "ymsgr" is a Provisional registration in the IANA Uniform Resource Identifier (URI) Schemes registry.

v1

z39.50 (Z39.50 information access)

The URI scheme "z39.50" is a Historical registration in the IANA Uniform Resource Identifier (URI) Schemes registry. It is described as "Z39.50 information access".

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 agentRead 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.

  1. Published by Koskamo

    qb · v1

  2. Published by Koskamo

    hxxps · v1

  3. Published by Koskamo

    ztdnaid · v1

  4. Published by Koskamo

    z39.50s (Z39.50 Session) · v1

  5. Published by Koskamo

    z39.50r (Z39.50 Retrieval) · v1

  6. Published by Koskamo

    z39.50 (Z39.50 information access) · v1

  7. Published by Koskamo

    ymsgr · v1

  8. Published by Koskamo

    xri · v1

  9. Published by Koskamo

    xrcp · v1

  10. Published by Koskamo

    xmpp (Extensible Messaging and Presence Protocol) · v1