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MCP QUEEN

The MCP Evidence Registry

Operational grades show whether a server connects and describes usable tools. Separate Trust Receipts show what has actually been observed about security and access boundaries, data integrity, citations, advertised claims, response quality, and real-world use.

Use MCP Queen in ChatGPT, Claude, or my agentWhy this registry is different
25517servers indexed
14061remote endpoints
14125graded (rolling)
20157trust observations
4response audits
650grade A
70%reachable
239msmedian latency
SortBestWorstJust probedMost toolsFastest
GradeAllA (650)B (12)C (523)D (202)F (613)Provisional
CategoryAll categoriesOther (516)AI & Agents (353)Cloud & Infra (259)Web & Search (252)Finance & Crypto (145)Productivity (78)Dev & Code (69)Data & Databases (65)Science & Health (58)Communication (55)Commerce (54)Media & Design (52)Security (44)

12 matches. Categories are keyword-derived from registry metadata — imperfect by design, deterministic by principle.

#ServerGradeScoreLatencyToolsProtocol accessProbed
1 app.recordo.api/recordo
Recordo: Task Planner & Notes
Productivity
D prov. 57
780ms auth-wellbehaved 08-26 02:45
2 co.nexalink/manage
NexaLink — Digital Business Card & Personal CRM
Productivity
D prov. 57
1005ms auth-wellbehaved 08-26 05:45
3 com.close/close-mcp
Productivity
D prov. 57
891ms auth-wellbehaved 08-26 09:45
4 com.plixana/crm
Plixana
Productivity
D prov. 57
947ms auth-wellbehaved 08-26 19:00
5 com.ontoramp/knowledge-cartographer
OntoRamp Knowledge Cartographer
Productivity
D prov. 55
200ms auth-wellbehaved 08-26 18:30
6 ai.waystation/jira
Productivity
D prov. 54
59ms auth-bare 08-26 01:30
7 ai.waystation/wrike
Productivity
D prov. 54
16ms auth-bare 08-26 01:30
8 app.lucid.mcp/lucid
Lucid
Productivity
D prov. 54
362ms auth-bare 08-26 02:30
9 app.zwier/mcp
Zwier (Group event planner)
Productivity
D prov. 54
127ms auth-bare 08-26 04:30
10 com.getspm/spm
SPM - Structured Project Memory
Productivity
D prov. 54
122ms auth-bare 08-26 13:00
11 ai.radiusos.www/crm
RadiusOS CRM
Productivity
D prov. 49
1374ms auth-bare 08-25 20:15
12 ai.threadminder/threadminder
Threadminder
Productivity
D prov. 49
962ms auth-bare 08-26 00:45

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Compare MCP servers by use case

Evidence-backed shortlists for high-intent decisions—not generated pages for every keyword.

Data & DatabasesWeb & SearchScience & HealthFinance & CryptoDev & Code Security & trust evidence

Methodology

Each server is probed live over streamable HTTP: reachability (25) — does initialize succeed; auth-gated servers earn partial credit only if they advertise WWW-Authenticate so clients can discover OAuth. protocol (15) — valid JSON-RPC handshake; deprecated SSE transport is penalized. tooling (35) — tools/list works, share of tools with descriptions and fully-typed input schemas, median description depth. latency (10) — initialize round-trip. provenance (15) — registry metadata completeness and whether the reverse-DNS namespace actually matches the serving domain. Scores scale to what is verifiable; unverifiable dimensions mark the grade provisional rather than guessing. Every point carries the verbatim observation that earned it. No stars, no votes, no pay-to-rank — probes only.

Trust Receipts are separate from the operational grade. Discovery records advertised security-sensitive capabilities, access caveats, citation promises, and corpus-size claims. Safe, read-only response audits sample eligible tools and test whether calls are usable, whether returned PMIDs/DOIs resolve against authoritative sources, and whether an apparently successful response actually contains an upstream error. Every observation includes its date, source type, sample size where applicable, and methodology version. No synthetic trust score is assigned, and absence of an observation means unaudited—not safe.

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