API Acre

Is API Acre MCP server safe?

• No hidden instructions were found in its tool descriptions.
• Its error messages showed no secrets or internal details.
• All 60 of its tools are labeled read-only.
• Overall it scored 89/100 on 30 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

60 tools, in the server's own words.

and 36 more

Test results

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

• !
  Every tool is described

  49 warnings

  • !web.extract: Inputs with no description: url, output
  • !web.metadata: Inputs with no description: url
  • !web.seo-audit: Inputs with no description: url
  • !web.security-audit: Inputs with no description: url
  • !web.accessibility-audit: Inputs with no description: url
  • !web.performance-profile: Inputs with no description: url
  • !web.links: Inputs with no description: url, include_external, max_pages, max_depth, respect_robots
  • !web.robots-sitemap: Inputs with no description: url
  • and 32 more
  note
• !
  Follows MCP best practices (not scored yet)

  2 tips (not scored)

  • !The tool list is about 394 KB (roughly 98k tokens). AI apps send it with every message, so it takes that much of the AI's memory before any work starts.
  • !developer.sql-change-review: Labeled read-only, but it takes a raw "sql" input. A read-only label can't promise much when the tool runs whatever it's sent; make the tool itself refuse changes (for example with a read-only database user), or drop the label. QAmcp doesn'
  note
• !
  Resources and prompts work

  1 warning ()

  • –Could not list resources: the server limited our requests (HTTP 429)
  • !Listing resource templates failed: Error POSTing to endpoint: {"type":"https://apiacre.com/problems/rate_limited","title":"Rate Limited","status":429,"detail":"Too many reque…
  note
• ✓
  ConnectsConnected in 949 ms
  pass
• ✓
  Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
  pass
• ✓
  Lists its toolsFound 75 tools
  pass
• ✓
  Tools are labeled safe or dangerousEvery tool has a safety label
  pass
• ✓
  No hidden instructionsNo hidden instructions found in tool descriptions
  pass
• ✓
  Tools work with good inputs

  All good

  • ✓web.extract: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.extract", "description": "Convert a…
  • ✓web.metadata: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.metadata", "description": "Extract …
  • ✓web.seo-audit: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.seo-audit", "description": "Audit o…
  • ✓web.security-audit: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.security-audit", "description": "Sc…
  • ✓web.accessibility-audit: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.accessibility-audit", "description"…
  • ✓web.performance-profile: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.performance-profile", "description"…
  • ✓web.links: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.links", "description": "Extract and…
  • ✓web.robots-sitemap: Answered with an error, probably because of our sample input: {"x402Version": 2, "error": "Payment required to access this tool", "resource": {"url": "mcp://tool/web.robots-sitemap", "description": "In…
  • and 32 more
  pass
• ✓
  Bad inputs give a clean error

  All good

  • ✓web.extract: Refused missing required input "url" with a clear error
  • ✓web.extract: Refused wrong type for "url" with a clear error
  • ✓web.metadata: Refused missing required input "url" with a clear error
  • ✓web.metadata: Refused wrong type for "url" with a clear error
  • ✓web.seo-audit: Refused missing required input "url" with a clear error
  • ✓web.seo-audit: Refused wrong type for "url" with a clear error
  • ✓web.security-audit: Refused missing required input "url" with a clear error
  • ✓web.security-audit: Refused wrong type for "url" with a clear error
  • and 32 more
  pass
• ✓
  Fast enough

  All good

  • ✓Connecting took 949 ms
  • ✓Listing tools took 511 ms
  • ✓Average tool answer: 207 ms
  • ✓web.extract: Slowest tool: web.extract (883 ms)
  pass
• ✓
  No secrets leakedChecked 174 error messages: no secrets or internal details
  pass
• –
  Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)
  not tested

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Score over time

• 30 Oct 202689

One test so far. New tests will show here.

Reviews

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