ComplyOnSite

Is ComplyOnSite MCP server safe?

• None of the hidden-instruction wordings we know were found in its tool descriptions.
• Its error messages showed no secrets or internal details.
• All 11 of its tools are labeled read-only.
• Overall it scored 93/100 on 2 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 it can do

11 tools, in the server's own words.

Test results

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

• !
  Every tool is described

  2 warnings

  • !fill_transfer_note: Inputs with no description: description, container, containerKind, place
  • !waste_code_search: Inputs with no description: limit
  note
• ✓
  ConnectsConnected in 369 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 11 tools
  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

  • ✓ewc_search: Worked (70 ms)
  • ✓first_aid_requirements: Worked (71 ms)
  • ✓havs_daily_exposure: Answered with an error, probably because of our sample input: Tool 1 needs a vibration value or an HSE category with its variant. {"summary":"Tool 1 needs a vibration value or an HSE category with its …
  • ✓noise_daily_exposure: Worked (45 ms)
  • ✓construction_injury_statistics: Worked (30 ms)
  • ✓power_tool_types: Worked (25 ms)
  • ✓waste_paperwork: Worked (29 ms)
  • ✓fill_transfer_note: Worked (46 ms)
  • and 3 more
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓ewc_search: Refused missing required input "query" with a clear error
  • ✓ewc_search: Refused wrong type for "query" with a clear error
  • ✓first_aid_requirements: Refused missing required input "shifts" with a clear error
  • ✓first_aid_requirements: Refused wrong type for "shifts" with a clear error
  • ✓havs_daily_exposure: Refused missing required input "tools" with a clear error
  • ✓havs_daily_exposure: Refused wrong type for "tools" with a clear error
  • ✓noise_daily_exposure: Refused missing required input "tasks" with a clear error
  • ✓noise_daily_exposure: Refused wrong type for "tasks" with a clear error
  • and 7 more
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 369 ms
  • ✓Listing tools took 743 ms
  • ✓Average tool answer: 51 ms
  • ✓waste_code_search: Slowest tool: waste_code_search (104 ms)
  pass
• ✓
  No secrets leakedChecked 16 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
• ✓
  Resources and prompts work

  All good (2 resources)

  • ✓Opened 2 of 2 resources
  • ✓An address that does not exist gets a clean "not found" error
  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

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Score over time

• 2 Nov 202693

One test so far. New tests will show here.

Reviews

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