INDIVIDUAL MCP TOOL

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.

numbers.onlinenone authenticationAvailability not checked

Input schema

{}

Risk classification

Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

Parent endpoint

numbers.online

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.

Related tools

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