Is the Onlyworlds MCP server down?

mcp-registry/com.onlyworlds/mcp · v3.4.4

As of 2026-10-18 03:23 UTC, the Onlyworlds MCP server is up with a Glimind reliability score of 96/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks.

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

claude mcp add --transport http onlyworlds-mcp-server https://www.onlyworlds.com/mcp

{
  "mcpServers": {
    "onlyworlds-mcp-server": {
      "type": "http",
      "url": "https://www.onlyworlds.com/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: C (71/100)

What to fix (4)

Auto-fix: 10 corrected tool definitions

Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. 10 tool(s) still need parameter descriptions written by someone who knows the API. All of them as JSON: /v1/readiness/mcp-registry%2Fcom.onlyworlds%2Fmcp/fixes

{
  "name": "create_element",
  "description": "Create one new element of `type` in the world named by your API-Key header.\n\n`type` is a slug from `list_element_types` (e.g. \"character\"). `element` is the\nfield payload: `name` plus any scalar, link, or extension fields for that type\n(call `get_element_schema(type)` for the field structure). Link fields are UUID\narrays (multi) or a single UUID (single); every linked id must already exist in\nthe world. Supply your own `id` (a UUID) to mint the element at that id, or omit\n`id` and the server min",
  "inputSchema": {
    "type": "object",
    "required": [
      "type",
      "element"
    ],
    "properties": {
      "type": {
        "type": "string"
      },
      "element": {
        "type": "object",
        "additionalProperties": true
      }
    },
    "additionalProperties": false
  },
  "annotations": {
    "readOnlyHint": false,
    "destructiveHint": false,
    "idempotentHint": false
  }
}

{
  "name": "get_changes",
  "description": "Return the delta feed for the world named by your API-Key header: every\nelement created/updated (`op: \"upsert\"`, full body) or deleted (`op:\n\"delete\"`) since `since_cursor`, in apply order, in pages of `limit`\n(default 25, max 1000). Entries carry FULL element bodies — a default page\nstays inside any client's token budget; measured worlds ran ~1.5-2k chars\nPER ENTRY, so raise `limit` only if you truly need bigger pages, and prefer\npaging with the cursor.\n\nOmit `since_cursor` (or pass \"\") to star",
  "inputSchema": {
    "type": "object",
    "properties": {
      "limit": {
        "type": "integer",
        "default": 25
      },
      "since_cursor": {
        "anyOf": [
          {
            "type": "string"
          },
          {
            "type": "null"
          }
        ],
        "default": null
      }
    },
    "additionalProperties": false
  },
  "annotations": {
    "readOnlyHint": true
  }
}

{
  "name": "get_element",
  "description": "Fetch one element by `type` and `id` (a UUID) from the world named by your\nAPI-Key header.\n\n`type` is a slug from `list_element_types`. Returns the full v2 wire shape\n(the same body as `GET /api/v2/{type}/{id}`): `type`, `id`, `name`, scalar\nfields, link fields as UUID arrays, and any extension fields inline. Requires a\nREAD or WRITE API-Key. Errors if no element of that type with that id exists in\nthe world.",
  "inputSchema": {
    "type": "object",
    "required": [
      "type",
      "id"
    ],
    "properties": {
      "id": {
        "type": "string"
      },
      "type": {
        "type": "string"
      }
    },
    "additionalProperties": false
  },
  "annotations": {
    "readOnlyHint": true
  }
}

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/com.onlyworlds/mcp"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/com.onlyworlds/mcp"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~2,332 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 100.00% uptime over 30 days.
• No breaking contract changes in 30 days.

Largest tool definitions

• list_elements ~251 tokens
• edit_links ~246 tokens
• update_element ~213 tokens
• get_changes ~207 tokens
• create_element ~205 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.onlyworlds%2Fmcp.svg)](https://glimind.com/server/mcp-registry%2Fcom.onlyworlds%2Fmcp?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Fcom.onlyworlds%2Fmcp?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.onlyworlds%2Fmcp.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.onlyworlds%2Fmcp.svg
   :target: https://glimind.com/server/mcp-registry%2Fcom.onlyworlds%2Fmcp?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:9f8c3a92ab79337c…, first seen 2026-10-17, included at leaf 10043 of 20,124. Version history · verify what your client received.

Tools (12)

• bulk_apply
• create_element
• edit_links
• get_changes
• get_element
• get_element_schema
• get_image_upload_ticket
• list_element_types
• list_elements
• search_elements
• search_schema
• update_element

Compare: most reliable data servers · most reliable media servers · most reliable search servers

claude mcp add --transport http glimind https://glimind.com/mcp

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Onlyworlds MCP server down right now?

As of 2026-10-18 03:23 UTC, the Onlyworlds MCP server is up with a Glimind reliability score of 96/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks.

How many tools does Onlyworlds MCP server provide?

Onlyworlds MCP server advertises 12 tools, including bulk_apply, create_element, edit_links, get_changes, get_element.

How do I install Onlyworlds MCP server?

Point your MCP client at this streamable-http endpoint: https://www.onlyworlds.com/mcp

Is the Onlyworlds MCP server safe to connect to an AI agent?

Glimind scanned all 12 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Onlyworlds MCP server?

Status page: 90-day uptime, every outage and how long it lasted.

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.