{
 "id": "dev.numberrank/numberrank",
 "name": "numberRank",
 "description": "Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth.",
 "connect": {
  "transport": "streamable-http",
  "url": "https://numberrank.dev/mcp"
 },
 "website": "https://numberrank.dev",
 "version": "1.0.0",
 "source": "official MCP registry (registry.modelcontextprotocol.io)",
 "reliability": {
  "verdict": "measuring",
  "attempts": 1,
  "successes": 1,
  "successRate": 1,
  "consecutiveSuccesses": 1,
  "lastStatus": "ok",
  "lastCheckedAt": "2026-10-06T21:25:49.179Z",
  "lastLatencyMs": 4932,
  "toolsAdvertised": 2,
  "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",
  "work": {
   "verdict": "testing",
   "tool": "directory",
   "attempts": 1,
   "successes": 1,
   "successRate": 1,
   "consecutiveSuccesses": 1,
   "lastStatus": "ok",
   "lastMs": 918,
   "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=dev.numberrank%2Fnumberrank",
 "page": "https://faceabot.com/tools/dev.numberrank/numberrank",
 "badge": {
  "image": "https://faceabot.com/badge/dev.numberrank/numberrank.svg",
  "markdown": "[![Measured by Faceabot](https://faceabot.com/badge/dev.numberrank/numberrank.svg)](https://faceabot.com/tools/dev.numberrank/numberrank)",
  "note": "Live reliability badge the publisher of this server can show on its README or website."
 },
 "recentChecks": [
  {
   "at": "2026-10-06T21:25:49.179Z",
   "ok": 1,
   "status": "ok",
   "ms": 4932,
   "f_status": "ok"
  }
 ]
}