Just Domain.

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

3 tools

Its own safety labels

3 read-only

Memory it takes

About 1,900 tokens of your AI's memory, just for its tool descriptions

Largest answer

About 24.8 KB in our test

Speed

Average answer in our test: 703 ms

Reliability

Answered 2 of 2 tests

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, 10 Nov 2026.

Is Just Domain. MCP server safe?

• Some wording in a tool description reads like an instruction to the AI. It may be harmless. See the test results below.
• Its error messages showed no secrets or internal details.
• All 3 of its tools are labeled read-only.
• Overall it scored 91/100 on 10 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

None found in GitHub Security Advisories on 8 Nov 2026.

That means none were published there, not that there are no problems. QAmcp tests how a server behaves. It does not scan source code.

What it can do

3 tools, in the server's own words.

Test results

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

• !
  No known hidden instructions

  1 warning

  • !check_trademark: Worth reading: text about keeping something from the person: "Never tell a user a name is clear unless it was checked during this conversation and every register in the answer was read today or yesterday.". It may be harmless. An AI reads t
  note
• !
  Resources and prompts work

  4 warnings (2 resources, 2 prompts)

  • !1 of 2 resources have no description, so people can't tell what they contain.
  • !domain://faq: The content contains "don't tell the user". If an AI reads this, it may follow it. Check where this text comes from.
  • !jd-check: Leaving out a required input gets an internal error instead of an "invalid input" error: Error rendering prompt 'jd-check': Missing required arguments: {'domains'}
  • !jd-transfer-check: Leaving out a required input gets an internal error instead of an "invalid input" error: Error rendering prompt 'jd-transfer-check': Missing required arguments: {'domain'}
  • and 3 more
  note
• ✓
  ConnectsConnected in 320 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 3 tools
  pass
• ✓
  Every tool is describedAll 3 tools and their inputs are described
  pass
• ✓
  Tools are labeled safe or dangerousEvery tool has a safety label
  pass
• ✓
  Tools work with good inputs

  All good

  • ✓search_domains: Answered with an error, probably because of our sample input: [invalid_query] Provide `domains` (a list of fully-qualified names) or `query` (free text).
  • ✓check_domain_transfer: Answered with an error, probably because of our sample input: [invalid_domain] That does not look like a domain name. Pass one full name, for example example.com.
  • ✓check_trademark: Worked (1.1 s)
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓check_domain_transfer: Refused missing required input "domain" with a clear error
  • ✓check_domain_transfer: Refused wrong type for "domain" with a clear error
  • ✓check_trademark: Refused missing required input "name" with a clear error
  • ✓check_trademark: Refused wrong type for "name" with a clear error
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 320 ms
  • ✓Listing tools took 144 ms
  • ✓Average tool answer: 703 ms
  • ✓check_trademark: Slowest tool: check_trademark (1.1 s)
  pass
• ✓
  No secrets leakedChecked 6 error messages: no secrets or internal details
  pass
• ✓
  Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guide
  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.

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.

Score over time

• 1 Nov 202691
• 6 Nov 202691
• 10 Nov 202691

Reviews

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