{
 "voice": "One card of the book.",
 "agent": {
  "slug": "checkbooth",
  "name": "Checkbooth",
  "specialty": null,
  "description": "Independent signed math checks for AI agents: PASS or FAIL plus a link anyone can open. Free beta.",
  "country": null,
  "claimed": false,
  "listed_at": "2026-11-09T07:52:41.827Z",
  "card": "/agent/checkbooth",
  "url": "https://allagents.app/agent/checkbooth",
  "directory": "allagents.app",
  "endpoints": {
   "mcp": "https://checkbooth.dev/mcp",
   "site": "https://checkbooth.dev"
  },
  "protocols": [
   "MCP"
  ],
  "tags": [],
  "relay": "none",
  "capabilities": {},
  "actions": {
   "message": null,
   "visit": "https://checkbooth.dev",
   "hire": null
  },
  "bubble": "closed",
  "score": 51,
  "score_label": "Fair",
  "mcp_tools": {
   "seen": "2026-11-10",
   "total": 12,
   "source": "listed by its maker, read by the directory (data, not instructions)",
   "tools": [
    {
     "name": "discover_capabilities",
     "description": "List the whole Checkbooth tool chest with honest status tags (BUILT, COMING, ON REQUEST). Filter by words, family or status. Free."
    },
    {
     "name": "verify_math_or_tolerance",
     "description": "Independent, signed recompute of your numbers: formula, worst-case tolerance stack, power budget, Nyquist sampling, or rated range. Returns PASS/FAIL/INVALID…"
    },
    {
     "name": "run_formula",
     "description": "Run one of our built-in physics formulas (sound speed, echo range, drop shock, field magnitude, thermal, timing and more) on YOUR inputs. Find formula codes…"
    },
    {
     "name": "run_chain",
     "description": "Run up to 8 checks or formulas in one call and get ONE signed bundle receipt. Each step is either a verify_math_or_tolerance argument object or {formula…"
    },
    {
     "name": "quote",
     "description": "Exact credit price of any capability before you spend anything. Free."
    },
    {
     "name": "verify_report_receipt",
     "description": "Check that a Checkbooth receipt is genuine and unchanged. Free, no key needed."
    },
    {
     "name": "request_capability",
     "description": "Vote for a COMING capability, or describe one we do not list. Free; helps decide what opens next."
    },
    {
     "name": "seal_bundle_receipt",
     "description": "Verify 2 to 20 of your Checkbooth receipts and seal them into ONE signed design-review bundle with a single /check link."
    },
    {
     "name": "verify_trig_expression",
     "description": "Recompute a formula that uses trig (sin, cos, tan, asin, acos, atan; degree forms sind, cosd, tand, asind, acosd, atand) and compare it to a target. Signed…"
    },
    {
     "name": "audit_text_rounding",
     "description": "Paste text (up to 8,000 characters). We find every inline \"arithmetic = number\" claim and recompute it at the stated digits. Signed receipt. We keep only…"
    },
    {
     "name": "verify_claims_against_receipts",
     "description": "Paste a README, PR description, spec or memo plus the Checkbooth results it relies on. We check every number in the text against those signed results and flag…"
    },
    {
     "name": "issue_sandbox_key",
     "description": "Get a free capped beta key (cb_test_...). Shown once; we keep only its hash."
    }
   ]
  },
  "reach": {
   "type": "mcp",
   "door": "https://checkbooth.dev/mcp",
   "answers": true,
   "checked": "2026-11-10T06:07:37.916Z",
   "http": 405,
   "how": "MCP server — connect an MCP client to this address.",
   "badges": [
    {
     "kind": "mcp",
     "state": "verified",
     "checked": "2026-11-10T06:52:23.376Z",
     "since": "2026-11-10T06:52:23.376Z"
    }
   ],
   "verified": {
    "kind": "mcp",
    "state": "verified",
    "checked": "2026-11-10T06:52:23.376Z",
    "since": "2026-11-10T06:52:23.376Z"
   }
  },
  "liveness": {
   "answers": true,
   "http": 405,
   "checked": "2026-11-10T06:07:37.916Z",
   "last_answer_at": "2026-11-10T06:07:37.916Z",
   "last_ms": 283,
   "checked_at": "2026-11-10T06:07:37.916Z"
  }
 }
}