Contractor License Server

Real-time contractor license verification across 45 US states. An MCP server that lets Claude Desktop, Cursor, and any MCP-compatible AI agent verify a contractor's license, status, expiration, and disciplinary history directly against state licensing board portals.

Send {state, license_number, trade} — get back validity, licensee name, expiration date, status, and any disciplinary actions on file. Results are fetched live from official state portals (no stale nightly exports) and cached for 24 hours when active.

Why this server

• 45 states covered via official state licensing board portals, not third-party data aggregators
• Live lookups — each verification hits the authoritative portal, so expirations and disciplinary actions are as fresh as the board's own data
• Batch verification — up to 25 licenses per call, run in parallel
• Disciplinary history — returned when the portal exposes it
• Backed by TradesAPI, a hosted HTTP API you can also hit directly

Quick start

Claude Desktop

Add this to your Claude Desktop config:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "tradesapi": {
      "command": "npx",
      "args": ["-y", "contractor-license-mcp-server"],
      "env": {
        "CLV_API_URL": "https://www.tradesapi.com",
        "CLV_API_KEY": "your-api-key-here"
      }
    }
  }
}

Restart Claude Desktop after saving.

Getting an API key

1. Go to www.tradesapi.com and click Sign up free
2. Enter your email — you'll get a magic link
3. Click the link and land on your dashboard, where your API key is waiting

New accounts start with 50 free verification credits, no credit card required. You can purchase additional credit packs from the dashboard when you need more.

Direct install

npm install -g contractor-license-mcp-server

Tools

clv_verify_license

Verify a single contractor license against a state licensing board portal.

Parameter	Required	Description
state	yes	Two-letter state code (CA, TX, FL, ...)
license_number	yes	The license number to verify
trade	no	general, electrical, plumbing, hvac, mechanical, residential, or home_inspection (defaults to general)
force_refresh	no	Bypass the 24h cache and re-fetch from the portal
response_format	no	markdown (default) or json

Example result:

## License Verification: VALID

| Field      | Value                    |
|------------|--------------------------|
| Name       | ANDERSON, ORIN RAE       |
| License #  | TACLA00000103C           |
| State      | TX                       |
| Trade      | hvac                     |
| Status     | Active                   |
| Expiration | 05/12/2026               |

clv_batch_verify

Verify up to 25 licenses in a single call. Each verification runs independently — partial failures do not block the batch.

Parameter	Required	Description
licenses	yes	Array of { state, license_number, trade } objects (1–25 items)
response_format	no	markdown (default) or json

clv_list_supported_states

List all supported states, including portal URLs and available trades. Use this to see which states and trades you can query.

Parameter	Required	Description
response_format	no	markdown (default) or json

Supported states

Code	State	Trades
AK	Alaska	general, electrical, mechanical
AL	Alabama	general, electrical, plumbing, hvac, residential
AR	Arkansas	general
AZ	Arizona	general, electrical, plumbing, hvac
CA	California	general, electrical, plumbing, hvac
CO	Colorado	electrical, plumbing
CT	Connecticut	general, electrical, plumbing, hvac
DC	District of Columbia	general
DE	Delaware	electrical, plumbing, hvac
FL	Florida	general, electrical, plumbing, hvac
GA	Georgia	general
HI	Hawaii	general
IA	Iowa	electrical
ID	Idaho	electrical, plumbing, hvac
IL	Illinois	general, electrical, plumbing, hvac
IN	Indiana	plumbing
KY	Kentucky	general, electrical, hvac, plumbing
LA	Louisiana	general
MA	Massachusetts	general, mechanical
MD	Maryland	general, hvac, electrical, plumbing
ME	Maine	electrical, plumbing
MI	Michigan	electrical, plumbing, hvac
MN	Minnesota	general, electrical, plumbing
MS	Mississippi	general
NC	North Carolina	general
ND	North Dakota	general, electrical
NE	Nebraska	general, electrical
NH	New Hampshire	electrical, plumbing
NJ	New Jersey	general, electrical, hvac, plumbing
NM	New Mexico	general, electrical, plumbing, hvac
NV	Nevada	general, electrical, plumbing, hvac
NY	New York	home_inspection
OH	Ohio	general, electrical, plumbing, hvac
OK	Oklahoma	electrical, plumbing, hvac
OR	Oregon	general
PA	Pennsylvania	general, electrical, hvac, plumbing
RI	Rhode Island	general
SC	South Carolina	general, electrical, plumbing, hvac
TN	Tennessee	general, electrical, plumbing
TX	Texas	hvac, electrical, plumbing
UT	Utah	general, electrical, plumbing, hvac
VA	Virginia	general, electrical, plumbing, hvac
VT	Vermont	electrical, plumbing
WA	Washington	general
WV	West Virginia	general, electrical, hvac, plumbing

Coverage expands continuously. Run clv_list_supported_states from your agent for the current list, or see the live state grid at www.tradesapi.com.

Configuration

Variable	Required	Description
CLV_API_URL	yes	API backend URL (use https://www.tradesapi.com)
CLV_API_KEY	yes	Your API key from the dashboard

Credits

Each license verification consumes 1 credit, whether the result is fresh or cached. New accounts receive 50 free credits. Additional credit packs can be purchased from the dashboard at www.tradesapi.com.

Development

git clone https://github.com/Noquarter6/contractor-license-mcp-server.git
cd contractor-license-mcp-server
npm install
npm run build
npm test

License

MIT