Outside-in rankings for public MCP servers.
We score public MCP URLs from the outside: reach the server, negotiate the dialect, list tools, complete a call, and record whether the result looked like the job. See methodology for how the score is weighted.
Updated Sep 16, 2026·158,547 runs·3292 servers·~every 6 hours
What each probe does
01
Negotiate
Modern 2026-07-28 path first (server/discover + per-request meta); legacy initialize/session if required.
02
Discover
tools/list (+ resources & prompts when the server exposes them).
03
Call
Safe tools/call — up to 20 read-only tools, plus schema-linked workflows.
04
Score
Invoke (accepted & well-formed) vs functional (response quality).
05
Composite
30-day reach · tool success · speed · spec → one score. Same suite for every server.
Default index path exercises safe reads with synthesized args — not your full docs/contract suite. Deeper contract probes are available on opted-in agents.
Every server with at least 20 probe runs in the last 30 days, ranked by score.
