In-depth architectural comparison of the Carrierscore 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.
At a Glance & Executive Verdict
Carrierscore
Developer Tools · Remote HTTP/SSE
Quality: 49/100 (Fair) | Auth: No auth required
Companies House
Developer Tools · Local stdio
Quality: 47/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Carrierscore if you need specialized Developer Tools tools running via a hosted cloud SSE transport. Choose Companies House if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Carrierscore 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: CARRIERSCORE_API_URL, CARRIERSCORE_API_KEY, PORT.
Carrier identity by US DOT number: legal name, DBA, operating status, FMCSA safety rating, fleet size, address, registration dates. Use first to confirm a DOT is real and matches the rate confirmation.
carrier_score
The CarrierScore risk score (0–100, higher = riskier) with full component breakdown, hard flags (active OOS order, no active insurance, reincarnated-carrier link), and data-sufficiency indicator.
montgomery_file
Timestamped carrier-selection evidence report — the documented artifact a broker retains at the moment of booking (post *Montgomery v. Caribe Transport II*). Text format on the free tier; JSON on paid tiers.
monitor_carriers
Batch score summary + flags for up to 100 DOT numbers per call — screen candidates for a load or re-check an active roster.
Companies House Tools (6)
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).
Carrierscore is categorized under Developer Tools and uses a remote streaming HTTP/SSE transport. In contrast, Companies House belongs to Developer Tools using local stdio subprocess. Select Carrierscore when you need capabilities focused on developer tools and Companies House when you require tools for developer tools.