CapCenter

Is CapCenter 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 12 of its tools are labeled read-only.
• Overall it scored 91/100 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

12 tools, in the server's own words.

Test results

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

• ✕
  Fast enough

  1 failed, 1 warning

  • !Average tool answer: 3.5 s
  • ✕get_affordability_estimate: Slowest tool: get_affordability_estimate (10.0 s): most users will give up waiting
  • and 2 more
  fail
• !
  Ready for the newest MCP version

  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.
  note
• ✓
  ConnectsConnected in 558 ms
  pass
• ✓
  Lists its toolsFound 12 tools
  pass
• ✓
  Every tool is describedAll 12 tools and their inputs are described
  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

  • ✓get_mortgage_quote: Worked (8.7 s)
  • ✓get_todays_rates: Worked (6.9 s)
  • ✓explain_loan_options: Worked (174 ms)
  • ✓get_next_step_link: Worked (80 ms)
  • ✓get_affordability_estimate: Worked (10.0 s)
  • ✓get_loan_limits: Worked (77 ms)
  • ✓compare_refinance_options: Worked (4.9 s)
  • ✓search_homes_for_sale: Answered with an error, probably because of our sample input: {"error":{"code":"invalid_parameters","message":"The request parameters are invalid. See issues.","issues":[{"param":"query","message":"Giv…
  • and 4 more
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓get_mortgage_quote: Refused missing required input "state" with a clear error
  • ✓get_mortgage_quote: Refused wrong type for "state" with a clear error
  • ✓get_todays_rates: Refused missing required input "state" with a clear error
  • ✓get_todays_rates: Refused wrong type for "state" with a clear error
  • ✓explain_loan_options: Refused wrong type for "topic" with a clear error
  • ✓get_next_step_link: Refused missing required input "action" with a clear error
  • ✓get_next_step_link: Refused wrong type for "action" with a clear error
  • ✓get_affordability_estimate: Refused missing required input "income" with a clear error
  • and 8 more
  pass
• ✓
  No secrets leakedChecked 21 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 (6 resources)

  • ✓Opened 6 of 6 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 202691

One test so far. New tests will show here.

Reviews

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