NumRadar

Name: NumRadar
Author: numradar

by numradarversion 0.2.2i★ –iComputer or cloud

Registry nameapp.numradar/mcp

Install

Overview

Description from the maker (original English)

Check whether phone numbers are registered on WhatsApp, from your AI agent.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Chat & email
You need to fill in: NUMRADAR_KEY, Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: NUMRADAR_KEY, Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "numradar": {
      "command": "npx",
      "args": [
        "-y",
        "@numradar/mcp"
      ],
      "env": {
        "NUMRADAR_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http numradar https://numradar.app/mcp --header 'Authorization: Bearer {api_key}'

Or run it on your computer

claude mcp add numradar --env NUMRADAR_KEY=your-value -- npx -y @numradar/mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "numradar": {
      "url": "https://numradar.app/mcp",
      "headers": {
        "Authorization": "Bearer {api_key}"
      }
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "numradar": {
      "command": "npx",
      "args": [
        "-y",
        "@numradar/mcp"
      ],
      "env": {
        "NUMRADAR_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "numradar": {
      "type": "http",
      "url": "https://numradar.app/mcp",
      "headers": {
        "Authorization": "Bearer {api_key}"
      }
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "numradar": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@numradar/mcp"
      ],
      "env": {
        "NUMRADAR_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

NUMRADAR_KEY secret required env
numradar API key (nr_live_...). Create one at https://numradar.app/app/keys
Authorization secret required HTTP header
Your numradar API key as a Bearer token: Bearer nr_live_... Create one at https://numradar.app/app/keys

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain numradar.app (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1765 servers in this category
Published to the registry more recently than 76% of the other 1765 servers in this category
Basic checks equal to or better than 100% of the other 1765 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is NumRadar safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: NUMRADAR_KEY, Authorization

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.2) reached the registry 8 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 31 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

@numradar/mcp

Check whether phone numbers are registered on WhatsApp, from your AI agent.

numradar answers one question well: is this number on WhatsApp? This is its Model Context Protocol server, so an agent can ask that question directly — validating a list, auditing contacts before a campaign, or checking a balance before spending it.

npx @numradar/mcp --token nr_live_YOUR_KEY

Create a key at numradar.app/app/keys.

Most people should not install anything

numradar runs a hosted MCP server. No package, no local process, no version to go stale on anyone's laptop:

https://numradar.app/mcp

Point your client at that URL with an Authorization: Bearer nr_live_... header and you are done.

"mcpServers": { "numradar": { "type": "http", "url": "https://numradar.app/mcp", "headers": { "Authorization": "Bearer nr_live_xxx" } } } }

The npm package exists for one real case: clients whose config file accepts a *command to spawn* but not a URL. claude_desktop_config.json is the common one. If you are editing a file like that, you need the package:

"mcpServers": { "numradar": { "command": "npx", "args": ["-y", "@numradar/mcp", "--token", "nr_live_xxx"] } } }

Configuration for 15 verified clients — Claude Code, Cursor, Windsurf, Zed, VS Code, Cline and the rest — is at numradar.app/mcp-server.

Tools

Tool	What it does	Cost
`validate_number`	One number. Registered or not, business account, line type, country.	1 credit
`bulk_validate`	Up to 10,000 numbers. Returns a job id immediately.	1 per definitive result
`get_job_status`	Progress counters, optionally per-number results.	Free
`list_jobs`	Recent bulk jobs on the account.	Free
`get_balance`	Credits remaining.	Free

Prompts

Clients that support MCP prompts surface these as slash commands.

Prompt	Arguments	What it does
`/check_numbers`	`numbers`	Validate a list and summarise which are reachable on WhatsApp.
`/clean_contact_list`	`numbers`, `purpose`	Audit a list before a campaign, and report what to fix.
`/check_before_spending`	`count`	Estimate the cost of a run and check the balance covers it.

Billing, and why it should change how an agent uses this

One credit per definitive answer — registered *or* not registered. Beyond that:

Invalid and unparseable numbers cost nothing. Send them. An agent that pre-filters numbers it is unsure about drops real contacts to save credits it was never going to spend.
An inconclusive upstream result costs nothing.
Credits never expire.

Numbers should be E.164 (+14155550100). Past a handful, prefer bulk_validate over a loop of validate_number: it is one job to poll rather than N round trips.

Options


`--token`	Your API key. Also read from `NUMRADAR_API_KEY`; the flag wins if both are set.
`--base`	API origin. Defaults to `https://numradar.app`.
`--version`	Print the version and exit.
`--help`	Print usage and exit.

Security

The API key is a bearer credential for your account. --token puts it in your shell history and in whatever config file spawns the process — prefer NUMRADAR_API_KEY from a secret store where your client supports it. Keys are revocable from the dashboard; revoke immediately if one is exposed.

Every tool call is authenticated, rate-limited and billed through numradar's ordinary public REST API. The MCP server does not embed the checker and has no separate billing path, so an agent calling a tool is treated exactly like a backend calling curl.

About this repository

This is the home of the npm package — its issue tracker and documentation. The server's source lives in a private monorepo and is not published here.

Found a bug, or a client whose configuration does not work? Open an issue.

Licence

MIT

NumRadar

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

@numradar/mcp

Most people should not install anything

Tools

Prompts

Billing, and why it should change how an agent uses this

Options

Security

About this repository

Licence