Close Knit

Is Close Knit MCP server safe?

• No hidden instructions were found in its tool descriptions.
• Its error messages showed no secrets or internal details.
• 25 of its 27 tools are labeled read-only; the others may change or send things.
• Overall it scored 88/100 on 30 Oct 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

27 tools, in the server's own words.

and 3 more

Test results

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

• ✕
  Fast enough

  1 failed

  • ✕get_home_prices: Slowest tool: get_home_prices (13.2 s): most users will give up waiting
  • and 3 more
  fail
• !
  Tools work with good inputs

  1 warning

  • !list_metrics: Answered with about 159 KB of text. Many AI apps cut off tool answers this big, so the AI may never see the end of it.
  • –evaluate_custom_criterion: The server limited our requests (HTTP 429), so it was not tested (not counted against the server)
  • –build_watch_spec: The server limited our requests (HTTP 429), so it was not tested (not counted against the server)
  • –rank_schools: The server limited our requests (HTTP 429), so it was not tested (not counted against the server)
  • –open_shared_search: Not run: labeled read-only, but its name starts with "open", which usually means it changes something. Skipped to be safe: if it only reads, a clearer name helps AI apps too, or test again with --owner
  • –send_feedback: Not run: labeled as changing data
  • –rate_answer: Not run: labeled as changing data
  • and 20 more
  note
• !
  Follows MCP best practices (not scored yet)

  1 tip (not scored)

  • !The tool list is about 119 KB (roughly 30k tokens). AI apps send it with every message, so it takes that much of the AI's memory before any work starts.
  note
• !
  Resources and prompts work

  1 warning (1 resource, 1 prompt)

  • !find-a-home: Inputs with no description: situation
  • and 3 more
  note
• ✓
  ConnectsConnected in 499 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 27 tools
  pass
• ✓
  Every tool is describedAll 27 tools and their inputs are described
  pass
• ✓
  Tools are labeled safe or dangerousEvery tool has a safety label
  pass
• ✓
  No hidden instructionsNo hidden instructions found in tool descriptions
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓find_areas: Refused missing required input "max_budget" with a clear error
  • ✓find_areas: Refused wrong type for "max_budget" with a clear error
  • ✓find_similar_areas: Refused missing required input "area_id" with a clear error
  • ✓find_similar_areas: Refused wrong type for "area_id" with a clear error
  • ✓get_area_overview: Refused missing required input "area_id" with a clear error
  • ✓get_area_overview: Refused wrong type for "area_id" with a clear error
  • ✓assess_listing: Refused missing required input "postcode" with a clear error
  • ✓assess_listing: Refused wrong type for "postcode" with a clear error
  • and 32 more
  pass
• ✓
  Tools work together

  2 chains working

  • ✓get_home_prices → get_address_history: get_address_history found what get_home_prices returned (address_id = "uk:addr:9d312d680365")
  • ✓get_home_prices → get_nearby_sales_summary: get_nearby_sales_summary found what get_home_prices returned (address_id = "uk:addr:9d312d680365")
  • ✓Stopped looking for more chains after the limit on tool calls
  pass
• ✓
  No secrets leakedChecked 88 error messages: no secrets or internal details
  pass

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

• 30 Oct 202688

One test so far. New tests will show here.

Reviews

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