Security & Testing

numbers.online

Provides phone number intelligence including validation, line type, spam risk, and do-not-contact signals.

1 endpoint4 known toolsFirst detected July 11, 2026Last detected August 29, 2026

ENDPOINT 1

https://numbers.online/api/v1/mcp

No auth detected

MCP server metadata

Name: numbers-online
Version: 1.0.0

Capabilities

tools

Server instructions

Read-only phone-intelligence tools. All outputs are supplementary, low-confidence signals; the calling agent keeps every routing and dialing decision.

Known tools 4

phone_lookup

Return a supplementary, low-confidence intelligence bundle for a phone number: validity, formatting, line type, range carrier, country, caller name (CNAM, where available), STIR/SHAKEN verstat (supply the call's verstat to fold it into the spam signal), a labeled spam signal, and a first-party do-not-contact (DNC) signal — a suppression preference registered by the number's own owner, never a copy of any government registry.

Inferred read-only

line_type

Return only the deterministic fields for a number — validity, line type (mobile / fixed line / VoIP / …), range carrier, country, and formatting.

Inferred read-only

caller_risk

Return a labeled, low-confidence risk read for an inbound caller: a spam signal (0–100, higher = riskier), verstat passthrough, and a first-party do-not-contact (DNC) signal — without a name dip.

Inferred read-only

dnc_check

Return a first-party do-not-contact signal (suppress / no_match / unknown) for a number, sourced ONLY from suppression preferences registered and verified by the number's own owner inside Numbers Online — never a copy of any government or licensed do-not-call registry.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.numbers-online]
url = "https://numbers.online/api/v1/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "numbers-online": {
      "type": "http",
      "url": "https://numbers.online/api/v1/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: numbers-online
Remote MCP URL: https://numbers.online/api/v1/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "numbers-online": {
      "url": "https://numbers.online/api/v1/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "numbers-online": {
      "type": "http",
      "url": "https://numbers.online/api/v1/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "numbers-online",
  "transport": "streamable-http",
  "url": "https://numbers.online/api/v1/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Trust Data Available

BuiltWith Trust API v2 evidence for numbers.online was fetched 2026-08-21T20:17:05.664Z and is being refreshed.

Trust status Trusted

numbers.online is assessed as Trusted: Domain has an established technology history spanning over a year.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.