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Directory / naulon
naulon
by naulon.app · https://gate.naulon.app/_naulon/mcp/public
Check citations and retractions by DOI, and see the x402 price an AI agent pays to cite a source.
11 of 11 checks · 11 Nov 2026
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
- 7 tools
- Its own safety labels
- 7 read-only
- Memory it takes
- About 1,900 tokens of your AI's memory, just for its tool descriptions
- Largest answer
- About 4.2 KB in our test
- Speed
- Average answer in our test: 2.5 s
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, 11 Nov 2026.
Is naulon MCP server safe?
- None of the hidden-instruction wordings we know were found in its 7 tool descriptions.
- Its error messages showed no secrets or internal details.
- All 7 of its tools are labeled read-only.
- Overall it scored 93/100 on 11 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 and OSV.dev on 11 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
7 tools, in the server's own words.
naulon_discoverread-onlyBrowse a TOPIC: list candidate articles by title and teaser, with no verdict on whether any of them answers a question.
naulon_appraiseread-onlyScore how relevant each candidate is to the topic, from its free teaser alone — a 0..1 relevance plus a one-line rationale.
naulon_quoteread-onlyProbe the real x402 toll for a source WITHOUT paying — the free 402 price check.
naulon_searchread-onlyFREE.
naulon_check_citationsread-onlyFREE citation and retraction check.
naulon_trace_passageread-onlyFREE.
naulon_retrieveread-onlyFREE preview, RESEARCH PAPERS only.
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Fast enoughnote
2 warnings
- !Average tool answer: 2.5 s
- !naulon_retrieve: Slowest tool: naulon_retrieve (8.5 s): users will notice the wait
- and 2 more
- ✓ConnectsConnected in 1.4 spass
- ✓Lists its toolsFound 7 toolspass
- ✓Every tool is describedAll 7 tools and their inputs are describedpass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓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 inputspass
All good
- ✓naulon_discover: Worked (658 ms)
- ✓naulon_appraise: Worked (205 ms)
- ✓naulon_quote: Worked (290 ms)
- ✓naulon_search: Worked (489 ms)
- ✓naulon_check_citations: Worked (6.8 s)
- ✓naulon_trace_passage: Answered with an error, probably because of our sample input: paste at least 40 words
- ✓naulon_retrieve: Answered with an error, probably because of our sample input: scholarly scholarly_corpus_search failed: 500 {"code":"57014","details":null,"hint":null,"message":"canceling statement due to statement ti…
- ✓Bad inputs give a clean errorpass
All good
- ✓naulon_discover: Refused missing required input "topic" with a clear error
- ✓naulon_discover: Refused wrong type for "topic" with a clear error
- ✓naulon_appraise: Refused missing required input "topic" with a clear error
- ✓naulon_appraise: Refused wrong type for "topic" with a clear error
- ✓naulon_quote: Refused missing required input "slug" with a clear error
- ✓naulon_quote: Refused wrong type for "slug" with a clear error
- ✓naulon_search: Refused missing required input "question" with a clear error
- ✓naulon_search: Refused wrong type for "question" with a clear error
- and 6 more
- ✓No secrets leakedChecked 16 error messages: no secrets or internal detailspass
- ✓Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guidepass
- –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://gate.naulon.app/_naulon/mcp/publicShow 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.
[](https://qamcp.dev/s/app-naulon-naulon.html)Score over time
- 11 Nov 202693
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use naulon, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. Free for 1 server, no card.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works