{
 "id": "io.usefulapi/signl4",
 "name": "SIGNL4 MCP by usefulapi",
 "description": "Read SIGNL4 alerts, teams, users and duty schedules; raise, acknowledge, close and annotate alerts.",
 "connect": {
  "transport": "streamable-http",
  "url": "https://signl4.usefulapi.io/mcp"
 },
 "website": "https://usefulapi.io/signl4/",
 "version": "1.0.0",
 "source": "official MCP registry (registry.modelcontextprotocol.io)",
 "reliability": {
  "verdict": "reliable",
  "attempts": 26,
  "successes": 26,
  "successRate": 1,
  "consecutiveSuccesses": 26,
  "lastStatus": "ok",
  "lastCheckedAt": "2026-10-19T16:50:45.466Z",
  "lastLatencyMs": 8000,
  "toolsAdvertised": 18,
  "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_tested",
   "note": "Faceabot has not run a real task on this server yet (it only tests tools that declare themselves read-only)."
  }
 },
 "details": "https://faceabot.com/api/catalog?id=io.usefulapi%2Fsignl4",
 "page": "https://faceabot.com/tools/io.usefulapi/signl4",
 "badge": {
  "image": "https://faceabot.com/badge/io.usefulapi/signl4.svg",
  "markdown": "[![Measured by Faceabot](https://faceabot.com/badge/io.usefulapi/signl4.svg)](https://faceabot.com/tools/io.usefulapi/signl4)",
  "note": "Live reliability badge the publisher of this server can show on its README or website."
 },
 "recentChecks": [
  {
   "at": "2026-10-19T16:50:45.466Z",
   "ok": 1,
   "status": "ok",
   "ms": 8000,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-19T02:10:44.642Z",
   "ok": 1,
   "status": "ok",
   "ms": 9217,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-18T10:40:43.086Z",
   "ok": 1,
   "status": "ok",
   "ms": 5826,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-18T02:10:43.134Z",
   "ok": 1,
   "status": "ok",
   "ms": 6648,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T18:05:43.389Z",
   "ok": 1,
   "status": "ok",
   "ms": 6011,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T09:55:44.525Z",
   "ok": 1,
   "status": "ok",
   "ms": 7149,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T02:05:48.528Z",
   "ok": 1,
   "status": "ok",
   "ms": 5637,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T18:45:50.548Z",
   "ok": 1,
   "status": "ok",
   "ms": 5200,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T11:41:01.186Z",
   "ok": 1,
   "status": "ok",
   "ms": 6433,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T04:45:55.167Z",
   "ok": 1,
   "status": "ok",
   "ms": 5657,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T21:50:53.104Z",
   "ok": 1,
   "status": "ok",
   "ms": 5844,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T15:01:06.502Z",
   "ok": 1,
   "status": "ok",
   "ms": 3833,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T08:16:00.755Z",
   "ok": 1,
   "status": "ok",
   "ms": 3090,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T01:45:29.115Z",
   "ok": 1,
   "status": "ok",
   "ms": 2735,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T19:20:20.011Z",
   "ok": 1,
   "status": "ok",
   "ms": 6205,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T12:50:35.974Z",
   "ok": 1,
   "status": "ok",
   "ms": 4035,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T06:26:16.091Z",
   "ok": 1,
   "status": "ok",
   "ms": 6764,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-13T23:36:13.446Z",
   "ok": 1,
   "status": "ok",
   "ms": 8997,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-13T17:31:09.538Z",
   "ok": 1,
   "status": "ok",
   "ms": 6466,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-13T11:21:12.132Z",
   "ok": 1,
   "status": "ok",
   "ms": 7255,
   "f_status": "auth_required"
  }
 ],
 "trust": {
  "access": "no sign-in needed",
  "tools": 18,
  "declaredReadOnly": 14,
  "declaredCanWrite": 4,
  "declaredDestructive": 4,
  "toolDefinitionsFingerprint": "72a8306678ee39f31a5539f753475312",
  "toolDefinitionsLastChangedAt": null,
  "toolDefinitionChangesSinceFirstSeen": 0,
  "firstSeenAt": "2026-10-18T02:10:43.291Z",
  "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."
 }
}