MCP QUEEN
com.onlyworlds/mcp A
Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.
Otherv1.0.0streamable-httpwww.onlyworlds.com
Grade evidence — probed 2026-07-24 13:15 UTC
| Criterion | Points | Observed |
|---|---|---|
| reachability | 25 / 25 | HTTP 200, initialize accepted in 127ms |
| protocol | 15 / 15 | valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo OnlyWorlds@3.4.4 |
| tooling | 35 / 35 | tools/list OK: 11 tools e.g. "list_element_types"; 11/11 described, 11/11 fully-typed schemas, median description 536 chars |
| latency | 10 / 10 | initialize round-trip 127ms |
| provenance | 12 / 15 | description present; no repository URL; version 1.0.0; namespace com.onlyworlds matches endpoint/repo |
Score 97/100 · latency 127ms · 11 tools · protocol access: open ⓘ
Trust receipt
Security, data integrity, citation quality, and advertised claims are measured separately from protocol uptime. Missing evidence is marked unverified, never converted into a pass.
| Dimension | Metric | Status | Evidence | Source |
|---|---|---|---|---|
| citation_quality | citation_capability_advertised | unverified | Metadata/tool descriptions advertise citation or evidence capability: Unauthenticated — schema is public reference | Items may reference each other by id, including a forward reference to a sibling later in the list. No response-level citation benchmark has verified this claim yet. | live_probe |
| security | sensitive_capabilities_declared | concern | 2 discovered tool(s) advertise potentially state-changing or privileged capabilities. Tool names: get_changes, bulk_apply. Classification is description-based and does not prove exploitability. Observed value: get_changes, bulk_apply Sample: n=2 | live_probe |
| security | authentication_boundary | observed | Live protocol probe observed auth_state=open. This describes discovery/access behavior; it is not by itself a vulnerability finding. Observed value: open | live_probe |
Machine-readable receipt: /api/trust/com.onlyworlds/mcp.json
Connect your agent
Claude Code:
claude mcp add --transport http mcp https://www.onlyworlds.com/mcp
Generic MCP client config:
{ "mcpServers": { "mcp": { "type": "http", "url": "https://www.onlyworlds.com/mcp" } } }
MCP Queen is a graded index, not a middleman — your agent connects directly to the server above. Check the grade and evidence first; that's the point.
Share this server: permalink https://mcpqueen.com/s/com.onlyworlds/mcp · referral link https://mcpqueen.com/go/com.onlyworlds/mcp (counts as “routed via the queen”).
Own this server? Embed your grade badge
Live operational-grade badge, re-probed continuously — not a security or data-quality certification. Put it in your README and link to the complete receipt:
[](https://mcpqueen.com/s/com.onlyworlds/mcp)
Think the grade is wrong? Fix the finding the evidence shows, then the next probe cycle picks it up automatically (full cycle ≈ 3 days) — or open a dispute via the MCP endpoint.
Queen Watch
Email alerts when the grade changes or the endpoint stops answering. Double-opt-in, one-click unwatch, free while in beta.
Probe history
| When (UTC) | Grade | Score | Latency |
|---|---|---|---|
| 2026-07-24 13:15 | A | 97 | 127ms |