{
 "id": "io.usefulapi/buttondown",
 "name": "Buttondown MCP by usefulapi",
 "description": "Read Buttondown subscribers, emails, analytics and automations; add subscribers; write email drafts.",
 "connect": {
  "transport": "streamable-http",
  "url": "https://buttondown.usefulapi.io/mcp"
 },
 "website": "https://usefulapi.io/buttondown/",
 "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": "2026-10-19T18:10:43.811Z",
  "lastLatencyMs": 5657,
  "toolsAdvertised": 25,
  "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%2Fbuttondown",
 "page": "https://faceabot.com/tools/io.usefulapi/buttondown",
 "badge": {
  "image": "https://faceabot.com/badge/io.usefulapi/buttondown.svg",
  "markdown": "[![Measured by Faceabot](https://faceabot.com/badge/io.usefulapi/buttondown.svg)](https://faceabot.com/tools/io.usefulapi/buttondown)",
  "note": "Live reliability badge the publisher of this server can show on its README or website."
 },
 "recentChecks": [
  {
   "at": "2026-10-19T18:10:43.811Z",
   "ok": 1,
   "status": "ok",
   "ms": 5657,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-19T03:50:41.388Z",
   "ok": 1,
   "status": "ok",
   "ms": 5140,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-18T11:55:41.939Z",
   "ok": 1,
   "status": "ok",
   "ms": 6824,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-18T02:50:41.200Z",
   "ok": 1,
   "status": "ok",
   "ms": 5396,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T18:50:41.585Z",
   "ok": 1,
   "status": "ok",
   "ms": 5489,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T10:30:46.992Z",
   "ok": 1,
   "status": "ok",
   "ms": 6939,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-17T02:45:47.946Z",
   "ok": 1,
   "status": "ok",
   "ms": 7141,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T19:10:51.089Z",
   "ok": 1,
   "status": "ok",
   "ms": 7768,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T12:05:49.564Z",
   "ok": 1,
   "status": "ok",
   "ms": 7897,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-16T05:10:59.695Z",
   "ok": 1,
   "status": "ok",
   "ms": 7352,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T22:20:52.026Z",
   "ok": 1,
   "status": "ok",
   "ms": 4718,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T15:26:01.259Z",
   "ok": 1,
   "status": "ok",
   "ms": 3720,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T08:41:01.235Z",
   "ok": 1,
   "status": "ok",
   "ms": 4047,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-15T02:10:29.128Z",
   "ok": 1,
   "status": "ok",
   "ms": 3358,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T19:45:15.769Z",
   "ok": 1,
   "status": "ok",
   "ms": 5708,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T13:15:34.370Z",
   "ok": 1,
   "status": "ok",
   "ms": 4080,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T06:51:16.026Z",
   "ok": 1,
   "status": "ok",
   "ms": 6926,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-14T00:01:30.637Z",
   "ok": 1,
   "status": "ok",
   "ms": 7850,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-13T17:55:48.958Z",
   "ok": 1,
   "status": "ok",
   "ms": 5662,
   "f_status": "auth_required"
  },
  {
   "at": "2026-10-13T11:45:58.849Z",
   "ok": 1,
   "status": "ok",
   "ms": 8000,
   "f_status": "auth_required"
  }
 ],
 "trust": {
  "access": "no sign-in needed",
  "tools": 25,
  "declaredReadOnly": 20,
  "declaredCanWrite": 5,
  "declaredDestructive": 2,
  "toolDefinitionsFingerprint": "e7c930be903c6fc8e0a7b1f7aa604462",
  "toolDefinitionsLastChangedAt": null,
  "toolDefinitionChangesSinceFirstSeen": 0,
  "firstSeenAt": "2026-10-17T18:50:41.848Z",
  "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."
 }
}