# io.github.cameron-creations/numberbroom-mcp

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

- name: io.github.cameron-creations/numberbroom-mcp
- version: 1.0.1
- connection class: R2 (oauth_consent_once)
- trust: 94/100
- quality: 86/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.cameron-creations%2Fnumberbroom-mcp
- tools: https://api.protogrid.dev/v1/servers/io.github.cameron-creations%2Fnumberbroom-mcp/tools

**An agent can connect after a one-time OAuth consent by a human.** Remote endpoint behind OAuth 2. Tokens stay with the agent; the registry only exposes the authorization metadata.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "numberbroom-mcp": {
      "type": "http",
      "url": "https://numberbroom.com/mcp",
      "headers": {
        "Authorization": "Bearer ${NUMBERBROOM_MCP_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${NUMBERBROOM_MCP_TOKEN}`.

## Trust

- hygiene: 100
- liveness: 99
- freshness: 85
- provenance: 90
- drivers: +repository +namespace-matches-repo +website +reachable +uptime-97% ~updated-36d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 86/100 (good)

### protocol: n/a (weight 25)

- n/a `protocol.modern`, `protocol.stateless`, `protocol.transport`, `protocol.list_ttl`: no remote answered a protocol handshake (not probed yet, unreachable, or local-only)

### authorization: 100 (weight 15)

- pass `auth.prm`: Protected Resource Metadata (RFC 9728) published
- pass `auth.as_metadata`: authorization server metadata reachable
- pass `auth.cimd`: Client ID Metadata Documents supported
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: verify_phone_number (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_credit_balance (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 263 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 2, about 263 tokens to load them all
- tool set hash: 4c5f407f46d742ca0f902389a3ca817e
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.cameron-creations/numberbroom-mcp.svg)](https://protogrid.dev/servers/io.github.cameron-creations/numberbroom-mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://numberbroom.com/mcp (streamable-http, auth oauth2, reachable true, uptime30d 0.9655172)

## Packages

_none_

## Tools (2)

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