Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Clerkfield MCP Server Verify Acme Roofing LLC in Florida and tell me if it's active."
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Verify U.S. businesses against official state registries and search UCC liens, from Claude, Cursor, VS Code, Windsurf and any other Model Context Protocol client.
Clerkfield reads each state's own business registry and UCC filing office, not a resold database, and returns every result with its official source and the date of the data. It's built for merchant cash advance funders, lenders and anyone doing KYB on U.S. businesses.
Tool | What it does |
| Checks a business against the registry of the state it was formed in. Returns pass, review or fail with flags explaining why (name match, active status, months in business, whether the owner is listed) and the state's record: legal name, entity id, status, formation date, addresses, registered agent and officers. |
| Lists UCC financing statements filed against a business (debtor) or by a lender (secured party), newest first, with a summary of active, lapsed and terminated filings and the lenders on active filings. Each filing has its file number, dates, parties, collateral and later amendments. |
| Which states each check covers today. Tool descriptions are built from it at start-up, so they always list the states covered right now. |
All tools are read-only.
Related MCP server: WhiteIntel MCP Server
Create a free account at clerkfield.com/app, open your profile and create an API key. Clerkfield is free during the beta.
Point your client at https://clerkfield.com/mcp (Streamable HTTP) with the header Authorization: Bearer <your key>.
Claude Code
claude mcp add --transport http clerkfield https://clerkfield.com/mcp --header "Authorization: Bearer YOUR_KEY"Cursor / VS Code / Windsurf (mcp.json)
{
"mcpServers": {
"clerkfield": {
"url": "https://clerkfield.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}Runs on your machine and calls the Clerkfield API. Needs Node.js 18.17 or later.
Claude Desktop (claude_desktop_config.json), Cursor, VS Code, Windsurf
{
"mcpServers": {
"clerkfield": {
"command": "npx",
"args": ["-y", "clerkfield-mcp"],
"env": { "CLERKFIELD_API_KEY": "YOUR_KEY" }
}
}
}Claude Code
claude mcp add clerkfield --env CLERKFIELD_API_KEY=YOUR_KEY -- npx -y clerkfield-mcpDocker
docker build -t clerkfield-mcp .
docker run -i --rm -e CLERKFIELD_API_KEY=YOUR_KEY clerkfield-mcpVariable | Required | Meaning |
| Yes | Your Clerkfield API key |
| No | API base URL (default |
"Verify Joes Pizza Italia Inc in New York and tell me how long it's been in business."
"Is Jane Doe listed as an officer of Acme Roofing LLC in Florida?"
"Show every active UCC lien on Harbor Street Bakery LLC in Connecticut, newest first."
"Which states can you search UCC liens by lender in?"
Coverage varies by state and grows over time: ask get_coverage, or see clerkfield.com/coverage.
When a state doesn't publish a field for free, the result says "not published" instead of leaving it blank. When a state's records can't be reached, the tool returns an error, never stale or guessed data.
Clerkfield reports on businesses only and is not a consumer reporting agency. Don't use results to decide an individual's eligibility for credit, employment, housing or insurance (terms).
Each verify_business and search_liens call counts as one request on your account.
API documentation: clerkfield.com/docs · OpenAPI: clerkfield.com/openapi.json
Support: hello@clerkfield.com
MIT © Bramonti Ventures LLC. This repository contains only the MCP client for the Clerkfield API.
Which U.S. states each check covers (business check, lien search, search by lender).
Inputs: state.
List UCC financing statements filed against a business (debtor) or filed by a lender (secured party), newest first, with a summary of active, lapsed and terminated filings and the lenders on active filings. Each filing has its file number, dates, status, parties, collateral and later amendments. Covered states: AL, AR, CT, FL, ID, KY, NE, NJ, NM, RI; search by lender in CT, FL, NE, NM, RI.
Inputs: state (required), debtor, active_only, secured_party.
Check a U.S. business against the official registry of the state it was formed in. Returns a verdict (pass, review or fail) with flags explaining why (name match, active status, months in business, whether the owner is listed), plus the state's record: legal name, entity id, status, formation date, addresses, registered agent and officers. Covered states: AL, AR, CO, CT, FL, ID, KY, MN, NJ, NM, NY, ND, OR, PA, TX.
Inputs: name (required), state (required), owner, min_months.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Scored across 3 tools
Each tool has a clearly distinct purpose: verifying a business, checking state coverage, and searching liens. The coverage tool is meta-level but does not overlap with the two lookup tools.
All three tools follow the same predictable verb_noun snake_case convention: verify_business, get_coverage, search_liens. There are no naming style deviations.
Three tools is a focused, well-scoped surface for this domain, and each tool earns its place. No tool appears redundant or missing at the count level.
The surface covers the core workflows: business verification, lien search by debtor or lender, and coverage discovery. Minor gaps exist, such as no separate business lookup or batch verification, but agents can work around them.
KYB / know your business: verify US firms vs state registries + OFAC sanctions screen. Keyless.
Cobalt Intelligence MCP — US Secretary-of-State business registration, UCC liens, and TIN/EIN…
Search US business entity records across all 53 jurisdictions in real time
US public-records intelligence for AI agents — companies, SEC, courts, spending, licenses.
