KnowFirm

KnowFirm MCP

Business lookup and search over KnowFirm's U.S. public-record API. Two read-only tools: business_lookup and business_search. Each call uses 1 credit on your KnowFirm account. No card or payment credentials are handled by this package.

Install

Node.js 20 or newer. Sign in at https://knowfirm.com/login and create an API key in the dashboard. Put the key only in the client's secret or env field.

Published package: @knowfirm/knowfirm-mcp on npm, version 0.1.0. Desktop bundle: knowfirm-mcp-0.1.0.mcpb on the v0.1.0 GitHub release (https://github.com/gitdhillonai/knowfirm-mcp/releases/tag/v0.1.0).

Claude Desktop

Open Settings → Developer → Edit Config (macOS file: ~/Library/Application Support/Claude/claude_desktop_config.json). Add the server and restart Claude Desktop:

{
  "mcpServers": {
    "knowfirm": {
      "command": "npx",
      "args": ["-y", "@knowfirm/knowfirm-mcp"],
      "env": {"KNOWFIRM_API_KEY": "YOUR_OWN_KEY"}
    }
  }
}

You can also import knowfirm-mcp-0.1.0.mcpb. Claude asks for the API key in the bundle's sensitive field.

Cursor

Open Cursor Settings → MCP → Add new MCP server, or edit ~/.cursor/mcp.json (global) or .cursor/mcp.json in a project:

{
  "mcpServers": {
    "knowfirm": {
      "command": "npx",
      "args": ["-y", "@knowfirm/knowfirm-mcp"],
      "env": {"KNOWFIRM_API_KEY": "YOUR_OWN_KEY"}
    }
  }
}

Reload MCP servers from the same settings page. The tools appear as business_lookup and business_search.

MCP Registry

The server is listed as io.github.gitdhillonai/knowfirm (stdio, npm package @knowfirm/knowfirm-mcp 0.1.0, plus the MCPB file).

• Registry record: https://registry.modelcontextprotocol.io/v0.1/servers/io.github.gitdhillonai%2Fknowfirm/versions/0.1.0
• Source manifest in this repo: server.json

Clients that install from the registry still need your own KNOWFIRM_API_KEY. This repo does not publish new versions from routine doc updates.

Generic npx

{
  "mcpServers": {
    "knowfirm": {
      "command": "npx",
      "args": ["-y", "@knowfirm/knowfirm-mcp"],
      "env": {"KNOWFIRM_API_KEY": "YOUR_OWN_KEY"}
    }
  }
}

Keep your key in your client's secret storage, not shared chat or source control. Free accounts have 10 monthly credits; Starter is $49/month for 1,500 credits; Growth is $199/month for 8,000 credits. Hard quotas, no automatic overage charges. Check https://knowfirm.com/pricing for current terms.

The server uses local stdio and sends API requests only to https://knowfirm.com. It does not store keys or log them. Returned business/source text is untrusted data, never instructions. Public-record coverage and freshness vary. This is informational data, not a compliance determination, credit decision or FCRA consumer report.

API docs: https://knowfirm.com/docs

The older knowfirm npm package is a separate HTTP SDK.