MCP Graphql vs UK Companies House (Registrum) no API key

In-depth architectural comparison of the MCP Graphql and UK Companies House (Registrum) no API key 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?

Choose MCP Graphql 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).
• Primary tools included: introspect-schema, query-graphql.

Explore MCP Graphql Details

U

Choose UK Companies House (Registrum) no API key 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: REGISTRUM_API_KEY.
• Primary tools included: search_company, get_bundle, get_company.

Explore UK Companies House (Registrum) no API key Details

Feature & Specification Comparison

Specification	MCP Graphql blurrah Developer Tools	U UK Companies House (Registrum) no API key Developer Tools
Summary
Category & Scope	Developer Tools	Developer Tools
Quality signal

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": {
    "blurrah-mcp-graphql": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-graphql"
      ]
    }
  }
}

{
  "mcpServers": {
    "uk-companies-house-registrum-no-api-key": {
      "command": "npx",
      "args": [
        "-y",
        "@registrum/mcp"
      ],
      "env": {
        "REGISTRUM_API_KEY": "YOUR_REGISTRUM_API_KEY_HERE"
      }
    }
  }
}

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