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Directory / NOMOS
NOMOS
by nomosprotocol.com · https://www.nomosprotocol.com/api/mcp
Ask a sealed authority whether an action may proceed. Answers are deterministic and citable.
11 of 11 checks · 8 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
- 6 tools
- Its own safety labels
- 3 read-only, 3 labeled as changing things
- Memory it takes
- About 2,700 tokens of your AI's memory, just for its tool descriptions
- Largest answer
- About 4.3 KB in our test
- Speed
- Average answer in our test: 375 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, 8 Nov 2026.
Is NOMOS MCP server safe?
- None of the hidden-instruction wordings we know were found in its 6 tool descriptions.
- Its error messages showed no secrets or internal details.
- 3 of its 6 tools are labeled read-only; the others may change or send things.
- Overall it scored 90/100 on 8 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
6 tools, in the server's own words.
verify_decisionread-onlyCheck whether an AI decision is allowed, denied, or needs escalation according to a sealed NOMOS governance artifact.
generate_governanceConvert one or more policy documents into a sealed NOMOS governance artifact (.nomos).
detect_contradictionsread-onlyAnalyze policy documents (and optional behavioral decision logs) to detect contradictions, hidden rules, and gaps between declared policy and observed behavior.
ask_authorityQuery a published authority on the NOMOS Exchange marketplace — a different system from verify_decision's own sealed policies.
find_authorityread-onlyFind which published authorities on the NOMOS Exchange govern something you are about to do, from a plain description (e.g.
request_authorityAsk for an authority (a law, regulation, standard or policy) to be added to the NOMOS Exchange when find_authority finds nothing.
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.
- !Bad inputs give a clean errornote
1 warning
- !find_authority: Accepted wrong type for "description" without complaining
- and 5 more
- ✓ConnectsConnected in 777 mspass
- ✓Lists its toolsFound 6 toolspass
- ✓Every tool is describedAll 6 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
- ✓verify_decision: Answered with an error, probably because of our sample input: Error: Authentication required
- ✓detect_contradictions: Answered with an error, probably because of our sample input: Error: Authentication required
- ✓find_authority: Worked (838 ms)
- –generate_governance: Not run: labeled as changing data
- –ask_authority: Not run: labeled as changing data
- –request_authority: Not run: labeled as changing data
- ✓Fast enoughpass
All good
- ✓Connecting took 777 ms
- ✓Listing tools took 152 ms
- ✓Average tool answer: 375 ms
- ✓find_authority: Slowest tool: find_authority (838 ms)
- ✓No secrets leakedChecked 9 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://www.nomosprotocol.com/api/mcpShow 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/com-nomosprotocol-nomos.html)Score over time
- 8 Nov 202690
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use NOMOS, 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