Greenslips - NSW green slip price comparison

Is Greenslips - NSW green slip price comparison MCP server safe?

• None of the hidden-instruction wordings we know were found in its tool descriptions.
• All 2 of its tools are labeled read-only.
• Overall it scored 95/100 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

2 tools, in the server's own words.

Test results

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

• !
  Bad inputs give a clean error

  3 warnings

  • !compare_ctp_prices: Accepted wrong type for "type" without complaining
  • !get_green_slip_result: Accepted missing required input "reference" without complaining
  • !get_green_slip_result: Accepted wrong type for "reference" without complaining
  note
• ✓
  ConnectsConnected in 547 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 2 tools
  pass
• ✓
  Every tool is describedAll 2 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

  • ✓compare_ctp_prices: Worked (215 ms)
  • ✓get_green_slip_result: Worked (195 ms)
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 547 ms
  • ✓Listing tools took 177 ms
  • ✓Average tool answer: 205 ms
  • ✓compare_ctp_prices: Slowest tool: compare_ctp_prices (215 ms)
  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 (1 resource, 1 template, 1 prompt)

  • ✓Opened 1 of 1 resources
  • ✓ui://greenslips/price-card-{version}: Filling in the pattern and opening it works (ui://greenslips/price-card-qamcp-test)
  • ✓An address that does not exist gets a clean "not found" error
  • ✓Opened 1 of 1 prompts
  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
• –
  No secrets leakedNo error messages to check
  not tested

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

• 2 Nov 202695

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Greenslips - NSW green slip price comparison, signed in with GitHub, one per person. Reviews never change the score.