Cardpeer MCP by Nova (CIVAI)

Is Cardpeer MCP by Nova (CIVAI) server safe?

• None of the hidden-instruction wordings we know were found in its tool descriptions.
• 0 of its 6 tools are labeled read-only; the others may change or send things.
• Overall it scored 74/100 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

• !
  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
• !
  Every tool is described

  5 warnings

  • !search_cards: Inputs with no description: condition, page, size
  • !search_listings: Inputs with no description: condition, page, size
  • !get_pricing: Inputs with no description: condition
  • !list_sets: Inputs with no description: game, language, page, size
  • !list_series: Inputs with no description: game
  note
• !
  Tools are labeled safe or dangerous

  1 warning

  • !6 of 6 tools have no safety label (read-only or dangerous): search_cards, search_listings, get_product, get_pricing, list_sets, list_series
  note
• !
  Follows MCP best practices (not scored yet)

  2 tips (not scored)

  • !6 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): search_cards, search_listings, get_product, get_pricing, list_sets, list_series
  • !6 tools don't say whether they reach outside services like the web (openWorldHint): search_cards, search_listings, get_product, get_pricing, list_sets, list_series
  note
• !
  Resources and prompts work

  1 warning (3 resources)

  • !civai-secops://cardpeer/@public/CAPTCHA_AGENT.md: The content contains "don't tell the user". If an AI reads this, it may follow it. Check where this text comes from.
  • and 2 more
  note
• ✓
  ConnectsConnected in 196 ms
  pass
• ✓
  Lists its toolsFound 6 tools
  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
• ✓
  Fast enough

  All good

  • ✓Connecting took 196 ms
  • ✓Listing tools took 126 ms
  pass
• –
  Tools work with good inputs

  Not tested

  • –search_cards: Not run: no safety label (if you own this server, test again in owner mode)
  • –search_listings: Not run: no safety label (if you own this server, test again in owner mode)
  • –get_product: Not run: no safety label (if you own this server, test again in owner mode)
  • –get_pricing: Not run: no safety label (if you own this server, test again in owner mode)
  • –list_sets: Not run: no safety label (if you own this server, test again in owner mode)
  • –list_series: Not run: no safety label (if you own this server, test again in owner mode)
  not tested
• –
  Bad inputs give a clean errorNot tested
  not tested
• –
  Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (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

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Score over time

• 2 Nov 202674

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Cardpeer MCP by Nova (CIVAI), signed in with GitHub, one per person. Reviews never change the score.