{
 "id": "com.stackenhance/signal",
 "name": "Signal by StackEnhance",
 "description": "How often 750+ e-commerce brands send marketing emails: counts, send dates, recent subject lines.",
 "connect": {
  "transport": "streamable-http",
  "url": "https://mcp.stackenhance.com/mcp"
 },
 "website": "https://stackenhance.com/signal",
 "version": "1.2.0",
 "source": "official MCP registry (registry.modelcontextprotocol.io)",
 "reliability": {
  "verdict": "reliable",
  "attempts": 28,
  "successes": 28,
  "successRate": 1,
  "consecutiveSuccesses": 28,
  "lastStatus": "ok",
  "lastCheckedAt": "2026-10-19T20:45:40.980Z",
  "lastLatencyMs": 7303,
  "toolsAdvertised": 3,
  "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=com.stackenhance%2Fsignal",
 "page": "https://faceabot.com/tools/com.stackenhance/signal",
 "badge": {
  "image": "https://faceabot.com/badge/com.stackenhance/signal.svg",
  "markdown": "[![Measured by Faceabot](https://faceabot.com/badge/com.stackenhance/signal.svg)](https://faceabot.com/tools/com.stackenhance/signal)",
  "note": "Live reliability badge the publisher of this server can show on its README or website."
 },
 "recentChecks": [
  {
   "at": "2026-10-19T20:45:40.980Z",
   "ok": 1,
   "status": "ok",
   "ms": 7303,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-19T07:50:42.997Z",
   "ok": 1,
   "status": "ok",
   "ms": 8483,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-18T15:10:43.794Z",
   "ok": 1,
   "status": "ok",
   "ms": 7658,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-18T04:35:39.627Z",
   "ok": 1,
   "status": "ok",
   "ms": 6020,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-17T20:40:40.288Z",
   "ok": 1,
   "status": "ok",
   "ms": 6406,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-17T12:15:41.413Z",
   "ok": 1,
   "status": "ok",
   "ms": 6955,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-17T04:35:45.195Z",
   "ok": 1,
   "status": "ok",
   "ms": 9160,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-16T20:55:44.086Z",
   "ok": 1,
   "status": "ok",
   "ms": 8068,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-16T13:50:56.655Z",
   "ok": 1,
   "status": "ok",
   "ms": 7810,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-16T06:55:51.741Z",
   "ok": 1,
   "status": "ok",
   "ms": 7835,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-16T00:05:48.843Z",
   "ok": 1,
   "status": "ok",
   "ms": 6676,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-15T17:11:25.643Z",
   "ok": 1,
   "status": "ok",
   "ms": 9111,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-15T10:26:00.857Z",
   "ok": 1,
   "status": "ok",
   "ms": 5345,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-15T03:55:27.727Z",
   "ok": 1,
   "status": "ok",
   "ms": 3159,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-14T21:30:18.347Z",
   "ok": 1,
   "status": "ok",
   "ms": 7358,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-14T15:00:48.251Z",
   "ok": 1,
   "status": "ok",
   "ms": 4944,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-14T08:35:33.047Z",
   "ok": 1,
   "status": "ok",
   "ms": 4245,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-14T01:51:15.300Z",
   "ok": 1,
   "status": "ok",
   "ms": 10259,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-13T19:45:55.327Z",
   "ok": 1,
   "status": "ok",
   "ms": 7522,
   "f_status": "no_safe_tool"
  },
  {
   "at": "2026-10-13T13:40:51.704Z",
   "ok": 1,
   "status": "ok",
   "ms": 8121,
   "f_status": "no_safe_tool"
  }
 ],
 "trust": {
  "access": "no sign-in needed",
  "tools": 3,
  "declaredReadOnly": 3,
  "declaredCanWrite": 0,
  "declaredDestructive": 0,
  "toolDefinitionsFingerprint": "73c1b19b785e9647be05dd0bf7b61fbc",
  "toolDefinitionsLastChangedAt": null,
  "toolDefinitionChangesSinceFirstSeen": 0,
  "firstSeenAt": "2026-10-17T20:40:40.447Z",
  "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."
 }
}