OnlyWorlds

connects

www.onlyworlds.com

Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.

https://www.onlyworlds.com/mcpWebsiteNo authMCP 2025-11-25v3.4.4last checked 24 Aug 2026spoke MCP on 3 of 3 checks (30 days)initialize in 162 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	No auth
Protected-resource metadata	✕Not found Without it a client has to guess where the authorization server lives.
Anonymous access	Handshake succeeds; 11 tools listable

What the probe found

No CORS headers for browser-based clients

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

Tools

bulk_applycreate_elementedit_linksget_changesget_elementget_element_schemalist_element_typeslist_elementssearch_elementssearch_schemaupdate_element

Contract history

24 Aug 2026v3.4.4first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/onlyworlds/badge.svg)](https://mcpi.app/servers/onlyworlds)