Every remote server in the official MCP registry, probed live and graded with receipts — the only MCP index where every grade shows its evidence.
7 matches. Categories are keyword-derived from registry metadata — imperfect by design, deterministic by principle.
| # | Server | Grade | Score | Tools |
|---|---|---|---|---|
| 1 | ai.borealhost/mcp BorealHost |
A | 100 | 95 |
| 2 | ai.dataecho/mcp | A | 100 | 26 |
| 3 | ai.exa/exa | A | 100 | 2 |
| 4 | app.clicon/lotus Lotus — AI Citation Intelligence |
A | 100 | 5 |
| 5 | ai.bringyour/bringyour Bring Your AI |
A | 97 | 7 |
| 6 | ai.example4/xmp4 xmp4 — Semantic code knowledge for your stack |
A | 97 | 16 |
| 7 | ai.quantifyme/quantifyme | A | 94 | 11 |
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.