Numberbroom MCP Server

by cameron-creations Your server? Claim it

answering

Numberbroom MCP is answering right now. Last checked 14 min ago. It exposes 2 tools. Last commit 3 Nov 2026.

Verify US phone numbers: line type, carrier, and TCPA litigator status via the NumberBroom API.

Uptime history 61 days of history · worst day 92%

61 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

265 ms

Response time

average over 24h

Stars

last commit 3 Nov 2026

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 14 September 2026. No other catalogue keeps this.

23 Sep a tool description was rewritten verify_phone_number

14 Sep a tool changed version

Nothing serious here today

Today is the operative word: we check Numberbroom MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add numberbroom-mcp --transport http https://numberbroom.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://numberbroom.com/mcp

~/.codex/config.toml

[mcp_servers.numberbroom-mcp]
url = "https://numberbroom.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "numberbroom-mcp": {
      "url": "https://numberbroom.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "numberbroom-mcp": {
      "type": "http",
      "url": "https://numberbroom.com/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

credit

get_credit_balance

Check the remaining pre-paid API credit balance for the connected NumberBroom account. Free to call — does not spend credits.

verify

verify_phone_number

Verify a single US phone number: carrier-level line type (mobile, landline, VoIP, toll-free or other), carrier name, an activity score with a likely-disconnected flag (a dead mobile still reports as mobile, so read isLikelyDisconnected, not lineType), and whether the number is a known TCPA litigator. Does not check Do Not Call registries. Costs $0.20, charged against the caller's NumberBroom API credit balance — a number that fails to parse as a phone number is not charged. Get an API key at https://numberbroom.com/settings.

Endpoints

URL	Transport	State	Latency	Checked
https://numberbroom.com/mcp	streamable-http	sign-in	279 ms	14 min ago

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Numberbroom MCP — questions

Answers built from our own checks of this server.

What can Numberbroom MCP do?

It exposes 2 tools, read directly from the server on our last check. Among them: get_credit_balance, verify_phone_number. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Numberbroom MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 265 ms. The bar chart above shows every period we have measured.

How do I connect Numberbroom MCP?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.

How do you sign in to Numberbroom MCP?

No API key is involved. Numberbroom MCP answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.

How fast is Numberbroom MCP?

It answers our handshake in 265 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Numberbroom MCP open source?

The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at numberbroom.com, which runs on its operator's own terms.