NumRadar

Name: NumRadar
Author: numradar

by numradarversion 0.2.2i★ 0iComputer or cloud

Registry nameapp.numradar/mcp

How to install

Overview

Description from the maker (original English)

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

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.

Passed 5/5 checks · What you ask goes through the maker’s server (numradar.app)

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude · about 5 min

You need a NumRadar key (sign up on the maker’s site, may cost money) · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1

Sign up and create a NumRadar key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the NumRadar site ↗
Done
Open Claude’s Connectors page
CustomizeConnectors
Done
Click “+ Add” → “Add custom connector” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · NameNumRadar
Remote MCP server URL · Addresshttps://numradar.app/mcp
Under Request headers, add this name and value
Header nameAuthorization
ValueBearer <paste your key here>
Paste the key only into the app’s field, never into a chat or to anyone
Leave Authentication as Claude detected it, then click Add
Done
Turn it on in a chat
+ConnectorsNumRadar
Done
Try it
Use NumRadar and tell me what you can do for me, then show me one thing
✓ If Claude says it is using NumRadar or shows a NumRadar tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect NumRadar yet

NumRadar needs your own key to connect, but OpenAI’s help page only describes OAuth sign-in; there is no key option we could verify

What you can do instead

A · Use an app that can connect NumRadar

Steps for Claude →You need a NumRadar key (sign up on the maker’s site, may cost money) · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1
Steps for Claude Code →You need a NumRadar key (sign up on the maker’s site, may cost money)
Steps for Cursor →You need a NumRadar key (sign up on the maker’s site, may cost money)
Steps for VS Code →You need a NumRadar key (sign up on the maker’s site, may cost money)

B · Others in Chat & email that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Inbox Zero✓ ChatGPT
Agent-Native Chat✓ ChatGPT
draw.io✓ ChatGPT

Works with Claude Code · about 5 min

You need a NumRadar key (sign up on the maker’s site, may cost money)

Sign up and create a NumRadar key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the NumRadar site ↗
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
3
Paste this command and press Enter
```
claude mcp add --transport http numradar https://numradar.app/mcp --header 'Authorization: Bearer {api_key}'
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see NumRadar listed as connected
Done
Try it
Use NumRadar and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using NumRadar or shows a NumRadar tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor · about 5 min

You need a NumRadar key (sign up on the maker’s site, may cost money)

Sign up and create a NumRadar key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the NumRadar site ↗
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the NumRadar settings, Authorization is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use NumRadar and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using NumRadar or shows a NumRadar tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 5 min

You need a NumRadar key (sign up on the maker’s site, may cost money)

Sign up and create a NumRadar key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
Open the NumRadar site ↗
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the NumRadar settings, Authorization is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use NumRadar and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using NumRadar or shows a NumRadar tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://numradar.app/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use NumRadar💬 Discussion →

For developers: Terminal commands and JSON settings

Over the web

Claude Code

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

Cursor (~/.cursor/mcp.json)

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

VS Code (mcp.json)

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

Installed on your computer

Claude Code

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

Claude Desktop (claude_desktop_config.json)

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

Cursor (~/.cursor/mcp.json)

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

VS Code (mcp.json)

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

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.

At a glance

GitHub stars i: 0
Downloads per weeki: 82/wk
Verified domain: ✓ numradar.app
Licence i: MIT
Connection: Computer or cloud
Transport: stdio, streamable-http
Latest versioni: 0.2.2
Categoryi: Chat & email
Published to registryi: Oct 29, 2026
Code last changedi: Aug 13, 2026
Maker: numradar
Packages: npm: @numradar/mcp
Repo: numradar/mcp
Website: numradar.app
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Connect over the internet in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Open WebUI Raycast

Run on your computer in

All apps, with pros and cons →

What it can do

The server asks you to sign in before it lists its tools.

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 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain numradar.app (the registry checks domain ownership)
✓ Pass
Still maintained
Code last changed 3 months ago
✓ Pass
Has a licence
Uses MIT
✓ Pass
Endpoint responds
Responded in 206 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Chat & emaili

More stars than 0% of the other 1947 servers in this category
Published to the registry more recently than 67% of the other 1947 servers in this category
Basic checks equal to or better than 100% of the other 1947 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 5 of 5 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 3 months ago, and the latest version (0.2.2) reached the registry 13 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 Business and above.

What can I use instead?

In the same category: Inbox Zero, Agent-Native Chat, draw.io

Alternatives

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

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

Inbox Zero

Search Gmail and Outlook, save drafts, manage email rules, and view email stats.

by elie222Widely used★ 13KUpdated 41 days ago

Runs in the cloud

Install

Agent-Native Chat

Minimal chat-first app with durable threads, actions, and the app-agent loop

by BuilderIOWidely used★ 7.7K Stars for the whole repoUpdated 2 months ago

Runs in the cloud

Install

draw.io

Create draw.io diagrams in chat from Mermaid or XML, shown live and interactive. 10,000+ shapes.

by jgraphWidely used★ 5.8KUpdated yesterday

Runs in the cloud✓ draw.io

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

What you can do with it

Install

Sign up and create a NumRadar key

Open Claude’s Connectors page

Click “+ Add” → “Add custom connector” and fill in these 2 fields

Turn it on in a chat

Try it

What you can do instead

Sign up and create a NumRadar key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Sign up and create a NumRadar key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Sign up and create a NumRadar key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Over the web

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Chat & emaili

Common questions

Alternatives

Inbox Zero

Agent-Native Chat

draw.io

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