MCP server

Plumbline - Contractor License Checks

ai.agentlookups/plumbline

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Free contractor-license checks from official state records; a no-match never proves unlicensed.

Website

At a glance

Type

MCP server

Publisher

agentlookups.ai (verified by the MCP Registry)

Status

Working at last check

Tools

1

Token cost

About 1,058 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

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

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"plumbline":{"type":"http","url":"https://contractors.agentlookups.ai/mcp"}}}

Antigravity

agy mcp add plumbline https://contractors.agentlookups.ai/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"plumbline","server_url":"https://contractors.agentlookups.ai/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"plumbline","server_url":"https://contractors.agentlookups.ai/mcp"}

Tools

• check_contractor ~1058 tokens
  Looks up a contractor's public credential in indexed state and local licensing records. Licenses, registrations and bond records mean different things. Each record carries a credential object (kind, label, note): kind is license, registration, business_license or bond when the source makes that clea

Related MCP servers

• Roofer Registry
  State-licensed roofing contractors with regulator discipline records and provenance.
• Proven Plaza Calculators & Open Data
  29 free construction calculators plus Florida contractor, permit, federal award and AI-crawler data.
• LicenseGround
  Deterministic trade contractor license verification & compliance gating for autonomous AI agents.
• PestPin
  US pest control license check by number, licensed-company search by city, and cost planning ranges.
• Kolmo
  WA permit rules (city + state baseline, cited), parcel zoning, L&I checks, Seattle estimates & ROI
• Contractor Licence Changes
  Did this contractor's licence change? Observed lapses and reinstatements, not a snapshot.
• contractors.fyi
  US contractors ranked by city permits, permit costs and timelines, solar and generator sizing.
• whoislicensed — state license lookup
  Verify a contractor, real estate or cosmetology license in 12 US states from the boards' own files.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/ai.agentlookups/plumbline.svg)](https://aptlynx.net/servers/ai.agentlookups/plumbline)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents