MCP Server

numberRank

dev.numberrank/numberrank
Security Public & reachable MCP 2026-07-28

What this MCP does

Identifies whether phone numbers use VoIP or carrier lines and provides line-quality scores.

check_number
Check a phone number's line type
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 verification. US numbers can be 10 digits; any other country needs + and the country code.
Read only Open world Idempotent
Input schema
{'type': 'object', 'required': ['number'], 'properties': {'number': {'type': 'string', 'description': 'Phone number, for example +15551234567'}}}
directory
List AI agent phone providers by line type
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.
Read only Idempotent
Input schema
{'type': 'object', 'properties': {}, 'additionalProperties': False}
Added
directory
Sept. 17, 2026, 12:39 p.m.
Added
check_number
Sept. 17, 2026, 12:39 p.m.