Viaduct

{
  "agent_id": "viaduct",
  "name": "Viaduct",
  "url": "https://c4.quietgridlabs.com/",
  "logo": "https://www.google.com/s2/favicons?domain=c4.quietgridlabs.com&sz=128",
  "niche": null,
  "category": null,
  "short_summary": "C4 architecture modeling tool with a hosted MCP server that lets AI coding agents such as Cursor and Claude Code read system context, diagrams, documentation,…",
  "task_performed": "unclear",
  "inputs_accepted": [],
  "outputs_produced": [],
  "integrations_available": [],
  "protocols_or_interfaces": [
    "MCP"
  ],
  "industry_fit": [],
  "autonomy_level": "unclear",
  "human_approval_needed": "unclear",
  "pricing_model": "free",
  "stated_free": {
    "quote": "or your team and AI agents. Explore Viaduct See the model Start free. No account required. Context: System boundary. Containers: Services and APIs. Components:",
    "url": "https://c4.quietgridlabs.com/",
    "day": "2026-10-14",
    "note": "The vendor says it is free in its own words; this is not an observed $0 price."
  },
  "price": {
    "observed": true,
    "billing": "subscription",
    "source_kind": "vendor",
    "currency": "USD",
    "lowest_monthly_usd": 11.23,
    "monthly_usd": 11.23,
    "headline": "From €10/mo",
    "commercial": {
      "entry_offer": {
        "line": "Monthly licence",
        "monthly_native": 10,
        "monthly_usd": 11.23,
        "commitment": "monthly",
        "basis": "€10/month",
        "billing_verified": true
      },
      "currency": "EUR",
      "notes": [
        "prices in EUR as published; USD figures are conversions at 2026-10-19"
      ],
      "lines": [
        {
          "name": "Monthly licence",
          "price": "€10 a month",
          "kind": "base_subscription",
          "billed": "monthly"
        }
      ]
    },
    "summary": "From €10/mo. A monthly licence costs €10 after a 7-day free trial, with coverage for up to three machines.",
    "confidence": "high",
    "source_url": "https://c4.quietgridlabs.com/pricing",
    "checked_at": "2026-10-19T03:55:35.766Z",
    "amount": 11.23,
    "display": "From $11.23/mo",
    "plans": [
      {
        "name": "Monthly licence",
        "price": "€10 a month",
        "period": "month",
        "persona": "individual",
        "highlights": [
          "7-day free trial",
          "No card or account required for trial",
          "One licence covers 3 machines",
          "Works offline between checks",
          "Cancel anytime"
        ],
        "promo_note": null,
        "price_promo": null,
        "price_annual": null
      }
    ],
    "source": "render+llm"
  },
  "trust_or_rating_signal": [],
  "evidence_quality": "unclear",
  "entity_type": "mcp_server",
  "regulated_data_suitability": "unclear",
  "evidence_urls": [
    "https://c4.quietgridlabs.com/"
  ],
  "last_checked": null,
  "how_to_connect": {
    "website": "https://c4.quietgridlabs.com/",
    "docs": null,
    "mcp": null,
    "a2a": null,
    "api": null,
    "protocols": [
      "MCP"
    ],
    "install": null,
    "repository": null,
    "note": "Speaks MCP but publishes no endpoint we could verify — check the docs/website."
  },
  "deployment": {
    "model": "unknown",
    "both_offered": false,
    "hosted_endpoint": null,
    "install": null,
    "note": "No deployment evidence held — Agentery has no endpoint, install instruction or directory attribute for this listing.",
    "evidence": null
  },
  "licence": {
    "name": null,
    "note": "No named licence found in the retained page text or source attributes. A public repository alone does not establish an open-source licence.",
    "evidence": null
  },
  "evidence_checks": {
    "price": {
      "source_url": "https://c4.quietgridlabs.com/pricing",
      "last_observed_day": "2026-10-19",
      "age_days": 1,
      "verified_day": "2026-10-19",
      "note": "verified = the page-text gate ran for that scan day (day-before/day-of text check)"
    },
    "agent_card": {
      "status": "unknown",
      "note": "no Agent Card URL recorded for this listing"
    },
    "endpoint": {
      "status": "unknown",
      "note": "endpoint not yet checked"
    }
  },
  "product_group": null,
  "liveness": {
    "probed": true,
    "alive": true,
    "endpoint_kind": "site",
    "latency_ms": 255,
    "uptime_7d": 1,
    "checked_at": "2026-10-19T02:48:15.791Z",
    "consecutive_failures": 0,
    "status": "alive"
  },
  "price_extras": {
    "free_tier": null,
    "unit_cost": null
  },
  "reported_success": null,
  "feedback": "If you actually use this provider, call report_outcome with the result. Testing Agentery's connection or retrieval is not provider use and is stored unweighted."
}