numberbroom-mcp
Verify US phone numbers: line type, carrier, and TCPA litigator status via the NumberBroom API.
Should I use this
Quality & Safety
Findings (2)
- HIGHTool poisoning patterns detected
- MEDIUMTool description contains URL to non-standard domainin verify_phone_number
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"numberbroom-mcp": {
"url": "https://numberbroom.com/mcp"
}
}
}Remote endpoints
https://numberbroom.com/mcpstreamable-httpWhat it can do
Tool inventory
Tools (2)
🟢verify_phone_number(phone)
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 $0.20, charged against the caller's NumberBroom API credit balance — a number that fails to parse as a phone number is not charged. Get an API key at https://numberbroom.com/settings.
Input Schema
{
"type": "object",
"properties": {
"phone": {
"type": "string",
"minLength": 1,
"maxLength": 40,
"description": "The phone number to verify, in any common US format (e.g. \"(555) 123-4567\")."
}
},
"required": [
"phone"
],
"$schema": "https://json-schema.org/draft/2020-12/schema"
}🟢get_credit_balance
Check the remaining pre-paid API credit balance for the connected NumberBroom account. Free to call — does not spend credits.
Input Schema
{
"type": "object",
"properties": {},
"$schema": "https://json-schema.org/draft/2020-12/schema"
}Community
Evidence