Black Flag Alert vs Companies House

In-depth architectural comparison of the Black Flag Alert and Companies House MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

B

Choose Black Flag Alert when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• You have access to required keys: BFA_API_KEY, BFA_BASE_URL.
• Primary tools included: search_companies, get_company, get_risk_narrative.

Explore Black Flag Alert Details

Choose Companies House when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• You have access to required keys: COMPANIES_HOUSE_API_KEY.
• Primary tools included: Company and officer search, Company profiles and statutory records, Ownership, appointments and disqualification lookup.

Feature & Specification Comparison

Specification	B Black Flag Alert Developer Tools	Companies House Developer Tools
Summary	UK company credit risk for England & Wales: R-Score, CCJs, charges, financials. 5.1M companies.	MCP server and CLI for the UK Companies House API. Search, filings, officers, due diligence.
Category & Scope	Developer Tools	Developer Tools

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "black-flag-alert": {
      "url": "https://blackflagalert.com/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "companies-house": {
      "command": "npx",
      "args": [
        "-y",
        "companies-house-mcp"
      ],
      "env": {
        "COMPANIES_HOUSE_API_KEY": "YOUR_COMPANIES_HOUSE_API_KEY_HERE"
      }
    }
  }
}

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