MemeStack

Is MemeStack MCP server safe?

• No hidden instructions were found in its tool descriptions.
• Its error messages showed no secrets or internal details.
• 19 of its 21 tools are labeled read-only; the others may change or send things.
• Overall it scored 77/100 on 25 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

21 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

  5 failed

  • ✕search_images: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (images/*/zap_total_sats must be number (in 10 items))
  • ✕search_charts: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (images/*/zap_total_sats must be number (in 10 items))
  • ✕browse_images: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (images/*/zap_total_sats must be number (in 10 items))
  • ✕search_text_in_image: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (images/*/zap_total_sats must be number (in 10 items))
  • ✕find_meme_for_text: Its reply breaks the MCP rules, so AI apps can't read it: its structured answer doesn't match its own output schema (images/*/zap_total_sats must be number (in 5 items))
  • –tag_autocomplete: Not run: labeled read-only, but its name starts with "tag", 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
  • –submit_image: Not run: labeled as changing data
  • –generate_meme: Not run: labeled as changing data
  • and 13 more
  fail
• !
  Ready for the newest MCP version

  1 warning

  • !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
  note
• !
  Bad inputs give a clean error

  2 warnings

  • !browse_images: Accepted wrong type for "tag" without complaining
  • !popular_tags: Accepted wrong type for "limit" without complaining
  • and 30 more
  note
• !
  Resources and prompts work

  1 warning (3 resources)

  • !Listing resource templates failed: Error POSTing to endpoint: {"jsonrpc":"2.0","error":{"code":-32000,"message":"Rate limit exceeded. Please slow down."},"id":null}
  • –memestack://attribution-guide: Not checked: the server limited our requests (HTTP 429)
  • –memestack://taxonomy: Not checked: the server limited our requests (HTTP 429)
  • –memestack://recent: Not checked: the server limited our requests (HTTP 429)
  • –An address that doesn't exist was not checked: the server limited our requests (HTTP 429)
  • –Could not list prompts: the server limited our requests (HTTP 429)
  note
• ✓
  ConnectsConnected in 267 ms
  pass
• ✓
  Lists its toolsFound 21 tools
  pass
• ✓
  Every tool is describedAll 21 tools and their inputs are described
  pass
• ✓
  Tools are labeled safe or dangerousEvery tool has a safety label
  pass
• ✓
  No hidden instructionsNo hidden instructions found in tool descriptions
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 267 ms
  • ✓Listing tools took 18 ms
  • ✓Average tool answer: 166 ms
  • ✓browse_by_tag: Slowest tool: browse_by_tag (354 ms)
  pass
• ✓
  No secrets leakedChecked 47 error messages: no secrets or internal details
  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.

Score over time

• 16 Oct 202682
• 17 Oct 202682
• 18 Oct 202682
• 25 Oct 202677

Reviews

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