{
 "id": "com.oper-stack/operstack",
 "name": "OperStack",
 "description": "Scores whether AI assistants can read, understand and quote a public website. No account.",
 "connect": {
  "transport": "streamable-http",
  "url": "https://oper-stack.com/api/mcp/"
 },
 "website": "https://oper-stack.com/mcp/",
 "version": "1.2.0",
 "source": "official MCP registry (registry.modelcontextprotocol.io)",
 "reliability": {
  "verdict": "reliable",
  "attempts": 38,
  "successes": 38,
  "successRate": 1,
  "consecutiveSuccesses": 38,
  "lastStatus": "ok",
  "lastCheckedAt": "2026-10-19T16:01:01.466Z",
  "lastLatencyMs": 8077,
  "toolsAdvertised": 11,
  "method": "MCP initialize + tools/list from Faceabot, identified as FaceabotProbe/1.0 plus, when the server declares a read-only tool (readOnlyHint), one call of that tool with a neutral sample input to check it really returns a result. Servers on the 2026-07-28 MCP revision (no initialize handshake) get the same checks in that revision",
  "work": {
   "verdict": "not_working",
   "tool": "fix_of_the_week",
   "attempts": 38,
   "successes": 0,
   "successRate": 0,
   "consecutiveSuccesses": 0,
   "lastStatus": "tool_error",
   "lastMs": 3295,
   "sampleInput": "{}",
   "method": "Faceabot calls one read-only tool (annotations.readOnlyHint) with a neutral sample input and checks that it returns a non-empty result without error."
  }
 },
 "details": "https://faceabot.com/api/catalog?id=com.oper-stack%2Foperstack",
 "page": "https://faceabot.com/tools/com.oper-stack/operstack",
 "badge": {
  "image": "https://faceabot.com/badge/com.oper-stack/operstack.svg",
  "markdown": "[![Measured by Faceabot](https://faceabot.com/badge/com.oper-stack/operstack.svg)](https://faceabot.com/tools/com.oper-stack/operstack)",
  "note": "Live reliability badge the publisher of this server can show on its README or website."
 },
 "recentChecks": [
  {
   "at": "2026-10-19T16:01:01.466Z",
   "ok": 1,
   "status": "ok",
   "ms": 8077,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-19T01:05:42.797Z",
   "ok": 1,
   "status": "ok",
   "ms": 7269,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-18T09:45:45.344Z",
   "ok": 1,
   "status": "ok",
   "ms": 8174,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-18T01:45:43.422Z",
   "ok": 1,
   "status": "ok",
   "ms": 5542,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-17T17:35:47.315Z",
   "ok": 1,
   "status": "ok",
   "ms": 6223,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-17T09:25:44.384Z",
   "ok": 1,
   "status": "ok",
   "ms": 6998,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-17T01:30:51.780Z",
   "ok": 1,
   "status": "ok",
   "ms": 5756,
   "f_status": "tool_error"
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  {
   "at": "2026-10-16T18:15:54.310Z",
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   "f_status": "tool_error"
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   "at": "2026-10-16T11:10:58.709Z",
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   "status": "ok",
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   "f_status": "tool_error"
  },
  {
   "at": "2026-10-16T04:15:56.814Z",
   "ok": 1,
   "status": "ok",
   "ms": 5604,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-15T21:20:52.821Z",
   "ok": 1,
   "status": "ok",
   "ms": 6624,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-15T14:31:15.741Z",
   "ok": 1,
   "status": "ok",
   "ms": 4028,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-15T07:50:31.353Z",
   "ok": 1,
   "status": "ok",
   "ms": 4094,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-15T01:15:30.825Z",
   "ok": 1,
   "status": "ok",
   "ms": 4381,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-14T18:50:20.428Z",
   "ok": 1,
   "status": "ok",
   "ms": 7963,
   "f_status": "tool_error"
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  {
   "at": "2026-10-14T12:20:37.872Z",
   "ok": 1,
   "status": "ok",
   "ms": 6809,
   "f_status": "tool_error"
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  {
   "at": "2026-10-14T05:56:15.127Z",
   "ok": 1,
   "status": "ok",
   "ms": 9438,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-13T23:11:02.124Z",
   "ok": 1,
   "status": "ok",
   "ms": 7593,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-13T17:05:53.179Z",
   "ok": 1,
   "status": "ok",
   "ms": 7648,
   "f_status": "tool_error"
  },
  {
   "at": "2026-10-13T10:55:58.004Z",
   "ok": 1,
   "status": "ok",
   "ms": 10335,
   "f_status": "tool_error"
  }
 ],
 "trust": {
  "access": "no sign-in needed",
  "tools": 11,
  "declaredReadOnly": 10,
  "declaredCanWrite": 1,
  "declaredDestructive": 0,
  "toolDefinitionsFingerprint": "59cfd9ed251e2375f496febd1e08de78",
  "toolDefinitionsLastChangedAt": null,
  "toolDefinitionChangesSinceFirstSeen": 0,
  "firstSeenAt": "2026-10-18T01:45:43.573Z",
  "protocol": "2025-06-18",
  "warnings": [],
  "note": "Facts observed by Faceabot when it last read this server's tool list. 'Can write' counts tools not declared read-only (annotations are self-declared). A changed fingerprint means tool names, descriptions or schemas changed since Faceabot first saw them: re-check before trusting an earlier approval."
 }
}