stillos-ratings-mcp

Check an MCP server before you install it.

Installing an MCP server means handing a stranger's code a tool surface inside your client. There is no standard way to ask "should I?" — this is one. It answers from a public census of 7,000+ MCP operators, refreshed every 6 hours, rated from the outside, unasked, the way a credit bureau rates a borrower rather than the way a badge rates whoever applied for it.

Free. No key, no signup, no account. Every figure is independently recomputable.

npx stillos-ratings-mcp check api.mcp.ai
npx stillos-ratings-mcp findings
npx stillos-ratings-mcp compare api.mcp.ai some-other-host.com

As an MCP server

{
  "mcpServers": {
    "stillos-ratings": { "command": "npx", "args": ["-y", "stillos-ratings-mcp", "mcp"] }
  }
}

Tools

What a finding actually means

The headline signal is a tool surface that changed while the version string did not.

Two anonymous tools/list enumerations of the same endpoint, at different times. The serverInfo.version string was byte-identical in both. The tool set was not. Any client that pinned that version and approved its tool list was never asked to re-approve what it now exposes — and if one of the added tools takes an action (writes, sends, moves money, deletes), that matters.

This is an observation about change. It is not an accusation of malice, and this tool will never phrase it as one.

One of a fleet, or one someone built?

The public registry is far more concentrated than it looks. Measured 2026-10-04 across 39,321 registry entries from 23,281 publishers: the top 10 publishers control 19.0% of it, one GitHub account alone publishes 2,365 servers, and 34.8% of tool-bearing servers share a boilerplate tool set with a template fleet — while 20,980 publishers have exactly one server.

So every answer carries a fleet block: who publishes it, how many servers that publisher has, and how many others share its core tool set. A server that is 1 of 1,022 running the same template is a different proposition from a one-off, and that was the most decision-relevant fact nobody was reporting.

It is a structural observation about how a server was produced — not an accusation of bad faith, and a large publisher can still ship good software. Where the registry does not cover a host, the block says concentration was not measured, which is deliberately not the same sentence as "not a fleet".

What this is not

• Not an audit. A grade is percentile standing within the measured population, not a security certification. The whole ecosystem scores low on these dimensions today.
• Not a pass when a host is missing. An unrated host returns NOT_RATED with an explicit warning. We enumerate 41.8% of the distinct remote-declaring hosts in the public registry (measured, as of 2026-10-04) — so absence is a statement about our reach, not about that operator. Unobserved is not attested safe.
• Not a clean bill of health when there is no finding. It means we did not observe that specific failure mode on that host.
• Not self-reported. No operator supplies its own numbers, and no operator can change its grade by asking us.

Disputing a number

Recompute it. The board is sealed and public, the method is published in full, and the dimensions are arithmetic over a public census — so there is no judgement call to argue with and no appeal to make to us.

• Method: https://stillosdigitalholdings.com/ratings/methodology
• Any operator's record: https://stillosdigitalholdings.com/ratings/n/<host>
• Verify a receipt: https://stillosdigitalholdings.com/notary/verify?hash=<receipt_hash> — every check_mcp_server answer carries the receipt_hash and a ready-made link in its recompute block (live example). Scope is integrity and timestamp only — it proves the board you are reading is the board that was sealed, not that any rating is "correct".

Data source

GET https://stillosdigitalholdings.com/ratings/node?host=<host> — free and unmetered. This package is a thin client over that endpoint, holds no credential, and can therefore leak none. Every answer it gives can be reproduced with curl.

MIT · Still OS Digital Holdings LLC, Wyoming