numberRank

dev.numberrankPublished by numberrank.devOfficial publisherv1.0.0Updated Oct 25, 2026

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

VerifiedStreamable HTTPWeb executableCommunication & CollaborationSecurity & Monitoring

Overview

AI-generated overview

A remote MCP server that checks whether a phone number is VoIP or a real carrier line, scoring it 0–100 with a letter grade, and lists graded AI agent phone and

What you can do
Check a phone number's line type and get a 0 to 100 score with a letter grade, based on Twilio Lookup line type intelligence, to judge whether it is VoIP or a real carrier line before relying on it for SMS or OTP verification. Accepts US numbers as 10 digits; other countries need a plus sign and country code. Browse a directory of AI agent phone providers and personal agents graded by whether their published and provisioned numbers read as real carrier lines or VoIP, with numbers masked.
When to use it
Use it when you need a quick read on whether a phone number is likely a real carrier line or VoIP, for example before trusting a number for SMS or OTP delivery, or when comparing AI agent phone providers in the directory.
Requirements
A remote endpoint at numberrank.dev over streamable HTTP; no authentication, environment variables or headers are declared. Network access is required.
Before you install
Phone numbers you submit are sent to a third-party service that uses Twilio Lookup, so consider whether the number is sensitive. Results are scores and grades, not guarantees, so do not treat them as definitive proof of a line's legitimacy.

Installation

In SourceWeft

  1. Open numberRank in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.numberrank%2Fnumberrank/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "numberrank": {
      "type": "http",
      "url": "https://numberrank.dev/mcp"
    }
  }
}

Tools

2

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.

Parametersnumberrequired

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.

Takes no parameters.

Version history

1
  1. v1.0.0LatestSep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.