Echo MCP vs Numbers Online — phone intelligence

In-depth architectural comparison of the Echo MCP and Numbers Online — phone intelligence 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 Echo MCP 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: Echo route-to-MCP tool wrapping, OpenAPI YAML and JSON schema support, Swaggo-based schema generation.

Explore Echo MCP Details

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Choose Numbers Online — phone intelligence 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).
• Primary tools included: phone_lookup, caller_risk, line_type.

Explore Numbers Online — phone intelligence Details

Feature & Specification Comparison

Specification	Echo MCP BrunoKrugel Developer Tools	N Numbers Online — phone intelligence Developer Tools
Summary	A zero-configuration Go library to automatically expose any existing Echo web framework APIs as MCP tools.	Read-only phone intelligence for AI voice agents — line type, risk, DNC, signed receipts.
Category & Scope	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": {
    "brunokrugel-echo-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ]
    }
  }
}

{
  "mcpServers": {
    "numbers-online-phone-intelligence": {
      "url": "https://numbers.online/api/v1/mcp"
    }
  }
}

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