Every remote server in the official MCP registry, probed live and graded with receipts — the only MCP index where every grade shows its evidence.
12 matches. Categories are keyword-derived from registry metadata — imperfect by design, deterministic by principle.
| # | Server | Grade | Score | Tools |
|---|---|---|---|---|
| 1 | ai.aviado/health | A | 100 | 8 |
| 2 | ai.dynamicfeed/dynamic-feed | A | 97 | 91 |
| 3 | ai.teenpsychiatry/library | A | 97 | 6 |
| 4 | ai.readypermit/geo Buildability™ — Property Zoning & Buildability™ Intelligence |
A | 93 | 8 |
| 5 | ai.cookiy/cookiy Cookiy |
C prov. | 66 | — |
| 6 | ai.smithery/smithery-ai-national-weather-service | C prov. | 66 | — |
| 7 | ai.outset/mcp Outset |
C prov. | 62 | — |
| 8 | ai.trendsmcp/market-research Market Research Trends MCP |
C | 62 | — |
| 9 | ai.visuary/actuarial-value-calculator Visuary Actuarial Value Calculator |
C prov. | 62 | — |
| 10 | ai.openhelm/deep-research | D prov. | 52 | — |
| 11 | ai.smithery/jenniferjiang0511-mit-ai-studio-hw3 | F | 15 | — |
| 12 | ai.smithery/mfukushim-map-traveler-mcp | F | 15 | — |
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.