Plumbline MCP Server

by agentlookups

answering

Plumbline is answering right now. Last checked 14 min ago. It exposes 1 tools.

Free public-record contractor license checks across 34 US jurisdictions (2.7M records). Tool

Uptime history 13 hours of history

13 hours agonow

100.0%

Uptime 24h

48 of 48 checks

Tools

read from the server

414 ms

Response time

average over 24h

open, no key

Access

streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add plumbline --transport http https://contractors.agentlookups.ai/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "plumbline": {
      "url": "https://contractors.agentlookups.ai/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.plumbline]
url = "https://contractors.agentlookups.ai/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "plumbline": {
      "url": "https://contractors.agentlookups.ai/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "plumbline": {
      "url": "https://contractors.agentlookups.ai/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

contractor

check_contractor

Check a contractor's license against official state and local licensing records covering dozens of US jurisdictions. The covered set grows over time; GET /v1/coverage on this host for the exact current list, and never assume from this description whether a jurisdiction is covered. Provide a license number or a business name, plus the jurisdiction. Returns match (the license record with status and provenance), candidates (disambiguate and call again; page with offset), no_match_in_index (NOT a determination of unlicensure), or jurisdiction_not_covered (with an official pointer URL for that jurisdiction; the response message states exactly what the link is, which for some jurisdictions is a consumer-protection or licensing-board page rather than a license lookup, so relay the message's wording and never present the link as a license lookup unless the message says it is one).

Endpoints

URL	Transport	State	Latency	Checked
https://contractors.agentlookups.ai/mcp	streamable-http	answering	392 ms	14 min ago

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Plumbline — questions

Answers built from our own checks of this server.

What can Plumbline do?

It exposes 1 tools, read directly from the server on our last check. Among them: check_contractor. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Plumbline working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 48 of 48 checks got a reply (100.0%), average response time 414 ms. The bar chart above shows every period we have measured.

How do I connect Plumbline?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Plumbline need an API key?

No. Plumbline completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Plumbline?

It answers our handshake in 414 ms on average, which is faster than 34% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.