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Directory / Mizan

Mizan

Q: Is Mizan MCP server safe?

QAmcp's test on 6 Nov 2026: None of the hidden-instruction wordings we know were found in its 5 tool descriptions. Its error messages showed no secrets or internal details. All 5 of its tools are labeled read-only. Overall it scored 100/100 on 6 Nov 2026. A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

by mizan.ac · https://mizan.ac/mcp

Player ban records from 560+ game community ban lists, with Steam's own bans. Reads need no key.

5 tools✓ all read-only✓ no account neededPricing: not listed

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100 /100

PASS

11 of 11 checks · 6 Nov 2026

Test it now for current results

At a glance

Runs where: On their server. What you send to it goes to them.
What you need: Nothing: it answered without a login
Tools: 5 tools
Its own safety labels: 5 read-only
Memory it takes: About 770 tokens of your AI's memory, just for its tool descriptions
Largest answer: About 11.3 KB in our test
Speed: Average answer in our test: 205 ms

Tokens are an estimate: the characters in its tool names, descriptions and inputs, divided by 4. The exact number depends on your AI model. Safety labels are what the server says about itself. From our latest test, 6 Nov 2026.

Is Mizan MCP server safe?

None of the hidden-instruction wordings we know were found in its 5 tool descriptions.
Its error messages showed no secrets or internal details.
All 5 of its tools are labeled read-only.
Overall it scored 100/100 on 6 Nov 2026.

A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.

What this test does not check

Its source code and packages.
What a tool quietly does behind the scenes, such as writing a file or calling another service.
Instructions hidden inside live tool answers. We only look for those in tool descriptions.
Hidden instructions worded in a way our list doesn't know yet.
Tools that could change something. Those are read, never run.

What QAmcp can and can't see · How to tell if an MCP server is safe · Hidden instructions · Prompt injection

Known security advisories

It lists no public code, so there is nothing to look up in GitHub Security Advisories or OSV.dev. QAmcp tests how a server behaves. It does not scan source code.

What it can do

5 tools, in the server's own words.

lookup_playerread-only

Look up a player's Mizan record: their bans across every list Mizan reads, whether any list banned them for cheating, and Steam's own VAC and game bans for a S…

check_playersread-only

Check up to 100 Steam accounts in one call, such as everyone on a game server: each account's bans across every list Mizan reads, whether a list banned it for …

list_sourcesread-only

List the ban lists Mizan reads, largest first: each list's name, who issues its bans, the games it covers, its bans and how many are in force, and whether Miza…

registry_statsread-only

The size of Mizan's registry: how many ban lists it reads, the bans on them, how many are in force, and the same counts for each game.

list_my_communitiesread-only

List the communities you belong to on Mizan, your role in each, their registry status and their game servers.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Follows MCP best practices (not scored yet)
1 tip (not scored)
- !5 tools don't say whether they reach outside services like the web (openWorldHint): lookup_player, check_players, list_sources, registry_stats, list_my_communities
note
✓
ConnectsConnected in 531 ms
pass
✓
Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
pass
✓
Lists its toolsFound 5 tools
pass
✓
Every tool is describedAll 5 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Tools work with good inputs
All good
- ✓lookup_player: Answered with an error, probably because of our sample input: {"found":false,"reason":"rate_limited"}
- ✓check_players: Answered with an error, probably because of our sample input: {"ok":false,"reason":"not_a_player_id"}
- ✓list_sources: Worked (281 ms)
- ✓registry_stats: Worked (142 ms)
- –list_my_communities: Needs you to sign in, so it was not tested (not counted against the server)
pass
✓
Bad inputs give a clean error
All good
- ✓lookup_player: Refused missing required input "query" with a clear error
- ✓lookup_player: Refused wrong type for "query" with a clear error
- ✓check_players: Refused missing required input "players" with a clear error
- ✓check_players: Refused wrong type for "players" with a clear error
- ✓list_sources: Refused wrong type for "game" with a clear error
pass
✓
Fast enough
All good
- ✓Connecting took 531 ms
- ✓Listing tools took 233 ms
- ✓Average tool answer: 205 ms
- ✓list_sources: Slowest tool: list_sources (281 ms)
pass
✓
No secrets leakedChecked 8 error messages: no secrets or internal details
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://mizan.ac/mcp

Show this score on GitHub

Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.

[![QAmcp score](https://qamcp.dev/s/ac-mizan-registry.svg)](https://qamcp.dev/s/ac-mizan-registry.html)

Score over time

6 Nov 2026100

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Mizan, signed in with GitHub, one per person. Reviews never change the score.

Is this your server? Get an alert the moment it breaks.

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