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MCP QUEEN

The Graded Registry

Every remote server in the official MCP registry, probed live and graded with receipts — the only MCP index where every grade shows its evidence.

16246servers indexed
7735remote endpoints
772graded (rolling)
208grade A
67%reachable
385msmedian latency
SortBestWorstJust probedMost toolsFastest
GradeAllA (208)B (3)C (198)D (107)F (256)Provisional
CategoryAll categoriesOther (204)AI & Agents (149)Web & Search (137)Cloud & Infra (65)Productivity (43)Dev & Code (35)Data & Databases (29)Finance & Crypto (27)Communication (21)Media & Design (19)Commerce (17)Security (13)Science & Health (13)

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

#ServerGradeScoreLatencyToolsAuthProbed
1 ai.mcpanalytics/analytics
Data & Databases
 A 97
 709ms 13 open 07-12 15:01
2 ai.myriade/myriade
Data & Databases
 A 94
 1033ms 11 open 07-12 15:01
3 ai.rootdata/public-directory
Root Data Public Directory
Data & Databases
 A 94
 961ms 8 open 07-12 15:46
4 ai.vibe-bi/mcp-server
Vibe BI MCP
Data & Databases
 C prov. 66
 288ms — auth-wellbehaved 07-12 18:16
5 ai.waystation/postgres
Data & Databases
 C prov. 66
 285ms — auth-wellbehaved 07-12 18:33
6 ai.waystation/supabase
Data & Databases
 C prov. 66
 276ms — auth-wellbehaved 07-12 18:33
7 app.elasticflow/mcp
Elasticflow
Data & Databases
 C prov. 66
 444ms — auth-wellbehaved 07-12 18:48
8 app.havnre/havn
HAVN
Data & Databases
 C prov. 66
 297ms — auth-wellbehaved 07-12 18:48
9 ai.eevy/mcp
Eevy
Data & Databases
 C prov. 62
 184ms — auth-wellbehaved 07-12 14:20
10 ai.fincontext/fincontext
Data & Databases
 C prov. 62
 344ms — auth-wellbehaved 07-12 14:31
11 ai.good-sport/good-sport
good-sport
Data & Databases
 C prov. 62
 78ms — auth-wellbehaved 07-12 14:31
12 ai.kubit/mcp-server
Kubit
Data & Databases
 C prov. 62
 866ms — auth-wellbehaved 07-12 14:46
13 ai.matih/mcp
Data & Databases
 C prov. 62
 1040ms — auth-wellbehaved 07-12 15:01
14 ai.sendinel/mcp-server
Sendinel
Data & Databases
 C prov. 62
 700ms — auth-wellbehaved 07-12 15:46
15 ai.sixta/sixta-connect
Data & Databases
 C prov. 62
 230ms — auth-wellbehaved 07-12 15:46
16 ai.statey/statey
Statey
Data & Databases
 C prov. 62
 339ms — auth-wellbehaved 07-12 17:47
17 app.qwady/borough
Borough NYC Real Estate API
Data & Databases
 C prov. 62
 730ms — auth-wellbehaved 07-12 19:18
18 ai.inventoryhero/inventory-hero
Inventory Hero
Data & Databases
 D prov. 57
 947ms — auth-wellbehaved 07-12 14:31
19 ai.qr-manager/qr-manager
QR Manager
Data & Databases
 D prov. 57
 766ms — auth-wellbehaved 07-12 15:31
20 app.eurolytics/eurolytics
Data & Databases
 D prov. 57
 767ms — auth-wellbehaved 07-12 18:48
21 app.warplink/warplink
WarpLink
Data & Databases
 D prov. 57
 910ms — auth-wellbehaved 07-12 19:31
22 ai.smithery/afgong-sqlite-mcp-server
Data & Databases
 F 15
 269ms — unreachable 07-12 16:16
23 ai.smithery/bielacki-igdb-mcp-server
Data & Databases
 F 15
 268ms — unreachable 07-12 16:46
24 ai.smithery/MisterSandFR-supabase-mcp-selfhosted
Data & Databases
 F 15
 276ms — unreachable 07-12 16:16
25 ai.smithery/pinion05-supabase-mcp-lite
Data & Databases
 F 15
 272ms — unreachable 07-12 17:16
26 ai.smithery/wgong-sqlite-mcp-server
Data & Databases
 F 15
 228ms — unreachable 07-12 17:32
27 ai.smithery/cpretzinger-ai-assistant-simple
Data & Databases
 F 12
 242ms — unreachable 07-12 16:46
28 app.potto/potto-japan
Data & Databases
 F 12
 513ms — unreachable 07-12 19:18
29 ai.autorfp/mcp
AutoRFP.ai
Data & Databases
 F 8
 — — unreachable 07-12 14:18

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.