Gaplessly Booking

Is Gaplessly Booking 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 6 of its tools are labeled read-only.
• Overall it scored 100/100 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

6 tools, in the server's own words.

Test results

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

• ✓
  ConnectsConnected in 331 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 6 tools
  pass
• ✓
  Every tool is describedAll 6 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

  • ✓find_venues: Answered with an error, probably because of our sample input: Send at least one of `name`, `location` (a suburb, city or postcode) or `kind`.
  • ✓get_venue: Answered with an error, probably because of our sample input: Send the venue's `slug` (the `venue` spelling is accepted too). It is the last path segment of the booking link, gaplessly.com/book/<slug>,…
  • ✓find_appointment_times: Answered with an error, probably because of our sample input: Send the venue's `slug` (the `venue` spelling is accepted too). It is the last path segment of the booking link, gaplessly.com/book/<slug>,…
  • ✓find_table_times: Answered with an error, probably because of our sample input: Send the venue's `slug` (the `venue` spelling is accepted too). It is the last path segment of the booking link, gaplessly.com/book/<slug>,…
  • –start_appointment_booking: Not run: labeled read-only, but its name starts with "start", 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
  • –start_table_booking: Not run: labeled read-only, but its name starts with "start", 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
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓find_venues: Refused wrong type for "name" with a clear error
  • ✓get_venue: Refused wrong type for "slug" with a clear error
  • ✓find_appointment_times: Refused missing required input "serviceId" with a clear error
  • ✓find_appointment_times: Refused wrong type for "serviceId" with a clear error
  • ✓find_table_times: Refused missing required input "partySize" with a clear error
  • ✓find_table_times: Refused wrong type for "partySize" with a clear error
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 331 ms
  • ✓Listing tools took 310 ms
  • ✓Average tool answer: 324 ms
  • ✓find_venues: Slowest tool: find_venues (608 ms)
  pass
• ✓
  No secrets leakedChecked 10 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
• –
  Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)
  not tested

Test it yourself

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Show this score on GitHub

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Score over time

• 2 Nov 2026100

One test so far. New tests will show here.

Reviews

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