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90
MCP live MCP 2025-11-25 streamable-http

numberRank

dev.numberrank/numberrank

Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth.

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
671ms
last probe
Tools
2
callable
Resources
0
readable
Prompts
0
available
Primary URL
https://numberrank.dev/mcp
Score: 90/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
2 tools, 0 resources, 0 prompts returned.
partial 3 or more catalogue items 0/10
2 items in total; 3 or more earns these points.
How to earn +10 points
Expose at least three tools, resources or prompts
Split a catch-all tool into focused ones, or publish your docs and templates as resources and prompts.
Docs →
pass Describes itself 10/10
89 characters; more than 30 earns these points.

Tools · 2

check_number

Tells you whether a phone number is VoIP or a real carrier line, with a 0 to 100 score and letter grade, using Twilio Lookup line type intelligence. Use it before relying on a number for SMS or OTP ve…

directory

Returns the numberRank directory: AI agent phone providers and personal agents graded by whether their published and provisioned numbers read as real carrier lines or VoIP. Numbers are masked.

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://numberrank.dev/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "numberrank": {
      "url": "https://numberrank.dev/mcp",
      "transport": "streamable-http"
    }
  }
}