Plumbline — a trust layer for LLM answers MCP server

Plumbline — a trust layer for LLM answers is a remote MCP server that gives an AI agent 18 tools, among them ask_prepare, ask_result, ask_submit_draft. It answers at https://plumbline.lattice-sys.com/mcp/demo over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.

Every figure re-checked against SQL-computed facts; unsupported questions refused with the reason.

Description as the publisher wrote it.

The 18 tools Plumbline — a trust layer for LLM answers offers

Add Plumbline — a trust layer for LLM answers to your AI client

Every block below points at https://plumbline.lattice-sys.com/mcp/demo. Pick your client and copy.

claude mcp add --transport http plumbline-a-trust-layer-for-llm https://plumbline.lattice-sys.com/mcp/demo

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://plumbline.lattice-sys.com/mcp/demo"]
    }
  }
}

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "servers": {
    "plumbline-a-trust-layer-for-llm": {
      "type": "http",
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "context_servers": {
    "plumbline-a-trust-layer-for-llm": {
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "serverUrl": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

name: Plumbline — a trust layer for LLM answers
version: 0.0.1
schema: v1
mcpServers:
  - name: Plumbline — a trust layer for LLM answers
    type: streamable-http
    url: https://plumbline.lattice-sys.com/mcp/demo

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "httpUrl": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "type": "http",
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

{
  "mcpServers": {
    "plumbline-a-trust-layer-for-llm": {
      "url": "https://plumbline.lattice-sys.com/mcp/demo"
    }
  }
}

goose://extension?url=https%3A%2F%2Fplumbline.lattice-sys.com%2Fmcp%2Fdemo&type=streamable_http&id=plumbline-a-trust-layer-for-llm&name=Plumbline%20%E2%80%94%20a%20trust%20layer%20for%20LLM%20answers

Is Plumbline — a trust layer for LLM answers up right now?

It answered our last check on 18 October 2026 in 536 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about Plumbline — a trust layer for LLM answers

Is there an official Plumbline — a trust layer for LLM answers MCP server?

Yes. It is published by lattice-sys.com and served from plumbline.lattice-sys.com, the vendor's own domain: https://plumbline.lattice-sys.com/mcp/demo.

How many tools does Plumbline — a trust layer for LLM answers have?

18, as returned by the server's own tools/list on 31 August 2026: ask_prepare, ask_result, ask_submit_draft, compare_departments, cross_check, describe_fact_capabilities, find_payroll_anomalies, get_ai_act_transparency, and 10 more.

Is Plumbline — a trust layer for LLM answers down?

It answered our last check on 18 October 2026 in 536 ms. Over 10 checks since 5 September 2026 it answered 10.

How do I add Plumbline — a trust layer for LLM answers to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://plumbline.lattice-sys.com/mcp/demo. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Plumbline — a trust layer for LLM answers need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: com.lattice-sys.plumbline. Endpoint host: plumbline.lattice-sys.com. ARD identifier: urn:air:com.lattice-sys.plumbline:mcp:mcp. First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.