Verify US phone numbers: line type, carrier, and TCPA litigator status via the NumberBroom API.
Quick Install
Automated & IDE SetupCopy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.
One-click editor setup isn’t available for this listing yet — we don’t have a confirmed install command, and we’d rather show nothing than point your editor at the wrong package or host. Follow the project’s own setup instructions, linked above.
Manual Client & Custom JSON ConfigExpand JSON ▾
No confirmed setup config for this listing yet. We only publish a config block when the install details come from the project itself — its README, its docs, or a verified owner. We haven’t found those for numberbroom-mcp, and we’d rather show nothing than a guess you’d paste into your client. Follow the project’s own setup instructions for the current steps.
Documentation Overview
NumberBroom MCP Server
A remote MCP server that lets AI agents (Claude Code, Cursor, Claude Desktop and other MCP clients that can send an Authorization header) verify US phone numbers through the NumberBroom API: carrier-level line type, carrier name, an activity score with a likely-disconnected flag, and TCPA litigator status.
This server is a thin, stateless proxy. It has no database and runs no OAuth flow — it forwards
your NumberBroom API key straight through to https://numberbroom.com/api/v1, which already
owns authentication, rate limiting, billing, and abuse protection. See
numberbroom.com/developers for the underlying REST API
this wraps.
Tools
| Tool | Description | Cost |
|---|---|---|
verify_phone_number | Line type, carrier, activity score, TCPA litigator flag for one US number. | $0.20/call, charged to your NumberBroom credit balance. Unparseable numbers are not charged. |
get_credit_balance | Remaining pre-paid credit balance on your NumberBroom account. | Free. |
Get an API key
- Sign up at numberbroom.com and add credit to your account.
- Generate an API key at numberbroom.com/settings.
Connect a client
Add this server as a remote MCP connection using its deployed URL,
https://numberbroom.com/mcp, with your NumberBroom API key as a Bearer token in the
Authorization header:
Step-by-step setup for Claude Code, Cursor, Claude Desktop, ChatGPT and other clients, with
copy-paste config for each, is at numberbroom.com/mcp-server.
Opening https://numberbroom.com/mcp in a browser redirects there; MCP clients are unaffected.
Local development
This starts the server at http://localhost:8787/mcp via wrangler dev.
Deploy
Deploys to Cloudflare Workers as numberbroom-mcp. Requires a Cloudflare account
authenticated via wrangler login.
Why a proxy, not a rewrite
Every tool call here is a direct, unmodified pass-through to NumberBroom's own /api/v1
endpoints. That means:
- Auth, rate limiting (5,000 lookups per key per day at most, and 500 for calls through this server unless the key has its own limit set in Settings), the circuit breaker, and billing are all enforced exactly once, by NumberBroom's own API — this server does not duplicate or second-guess any of it.
- A number that fails to parse costs nothing, same as calling the REST API directly.
- An upstream error page or network failure comes back to the agent as a plain tool error, never a thrown exception.
- This server never sees or stores your API key beyond the lifetime of a single request; each MCP tool call constructs an isolated server instance with no shared state between callers.
License
MIT
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Frequently Asked Questions about Numberbroom MCP
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