Numberbroom MCP Server

by cameron-creations Your server? Claim it

answering

Numberbroom MCP is answering right now. Last checked 4 min ago. It exposes 2 tools. Last commit 14 Sep 2026.

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

Uptime history 14 days of history · worst day 95%

14 days agonow

93.4%

Uptime 24h

85 of 91 checks

Tools

read from the server

304 ms

Response time

average over 24h

Stars

last commit 14 Sep 2026

What changed 1

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

14 Sep a tool changed version

Numberbroom MCP does not always answer

Over the last week it answered 98.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 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

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "numberbroom-mcp": {
      "url": "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

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

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, disconnected), carrier name, an activity score, 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	answering	267 ms	4 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 85 of 91 checks got a reply (93.4%), average response time 304 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 with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Numberbroom MCP need an API key?

No. Numberbroom MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Numberbroom MCP?

It answers our handshake in 304 ms on average, which is faster than 53% 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?

Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.