Was ist MCP? Demo-Server

Is Was ist MCP? Demo-Server server safe?

• No hidden instructions were found in its tool descriptions.
• Its error messages showed no secrets or internal details.
• 8 of its 10 tools are labeled read-only; the others may change or send things.
• Overall it scored 70/100 on 28 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

10 tools, in the server's own words.

Test results

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

• ✕
  Tools work with good inputs

  1 failed

  • ✕search: No answer within the time limit
  • –login: Not run: labeled as changing data
  • –submit_feedback: Not run: labeled as changing data
  • and 7 more
  fail
• !
  Every tool is described

  7 warnings

  • !search: Inputs with no description: query, limit, slug, kind
  • !fetch: Inputs with no description: id
  • !get_page: Inputs with no description: slug, section, format
  • !list_mcp_services: Inputs with no description: kategorie, status
  • !login: Inputs with no description: username, password
  • !submit_feedback: Inputs with no description: message, page, token
  • !site_statistics: Inputs with no description: token
  note
• !
  Follows MCP best practices (not scored yet)

  1 tip (not scored)

  • !Very common tool names: search, fetch. Next to other servers' tools the AI may mix them up; a short prefix helps (like "github_search" instead of "search").
  note
• !
  Resources and prompts work

  3 warnings (2 resources, 1 template, 3 prompts)

  • !wasistmcp://page/{slug}: A made-up value (wasistmcp://page/qamcp-test) gets an internal error instead of a clean "not found": Es gibt keine Seite mit dem Kürzel 'qamcp-test'.
  • !mcp_sicherheits_check: Leaving out a required input gets an internal error instead of an "invalid input" error: Error rendering prompt 'mcp_sicherheits_check': Missing required arguments: {'vorhaben'}
  • !passende_mcp_server: Leaving out a required input gets an internal error instead of an "invalid input" error: Error rendering prompt 'passende_mcp_server': Missing required arguments: {'beschreibung'}
  • and 3 more
  note
• ✓
  ConnectsConnected in 606 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 10 tools
  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

  • ✓search: Refused missing required input "query" with a clear error
  • ✓search: Refused wrong type for "query" with a clear error
  • ✓fetch: Refused missing required input "id" with a clear error
  • ✓fetch: Refused wrong type for "id" with a clear error
  • ✓get_page: Refused missing required input "slug" with a clear error
  • ✓get_page: Refused wrong type for "slug" with a clear error
  pass
• ✓
  Tools work togetherlist_pages → get_page: get_page found what list_pages returned (slug = "index")
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 606 ms
  • ✓Listing tools took 128 ms
  • ✓Average tool answer: 508 ms
  • ✓list_mcp_services: Slowest tool: list_mcp_services (645 ms)
  pass
• ✓
  No secrets leakedChecked 10 error messages: no secrets or internal details
  pass

Test it yourself

Free and open source. Same checks, same score.

Show this score on GitHub

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Score over time

• 28 Oct 202670

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Was ist MCP? Demo-Server, signed in with GitHub, one per person. Reviews never change the score.