Numbers Online — phone intelligence MCP Server

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answering

Numbers Online — phone intelligence is answering right now. Last checked moments ago. It exposes 4 tools. Last commit 16 Jun 2026.

Read-only phone intelligence for AI voice agents — line type, risk, DNC, signed receipts.

Uptime history 48 days of history · worst day 99%

48 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

546 ms

Response time

average over 24h

Stars

last commit 16 Jun 2026

Nothing serious here today

Today is the operative word: we check Numbers Online — phone intelligence every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add numbers-online --transport http https://numbers.online/api/v1/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

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

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

caller

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. A supplementary input to the agent's own policy, never a verdict on whether to accept or reject the call. Supply the call's STIR/SHAKEN verstat to fold it into the signal — a failed validation raises the risk.

dnc

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. "suppress" = the owner asked not to be contacted on this channel; "no_match" = no suppression preference on record (absence of suppress is not consent); "unknown" = the number could not be evaluated. Comes with a signed receipt recording the status "as of T". Advisory input to the agent's own process — it does not assert that a call is lawful.

line

line_type

Return only the deterministic fields for a number — validity, line type (mobile / fixed line / VoIP / …), range carrier, country, and formatting. No paid dip; a free, fast classification a voice agent can call before deciding to enrich.

phone

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. Advisory only — the agent keeps every routing and dialing decision.

Endpoints

URL	Transport	State	Latency	Checked
https://numbers.online/api/v1/mcp	streamable-http	answering	490 ms	0 min ago

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Numbers Online — phone intelligence — questions

Answers built from our own checks of this server.

What can Numbers Online — phone intelligence do?

It exposes 4 tools, read directly from the server on our last check. Among them: caller_risk, dnc_check, line_type, phone_lookup. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Numbers Online — phone intelligence working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 546 ms. The bar chart above shows every period we have measured.

How do I connect Numbers Online — phone intelligence?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Numbers Online — phone intelligence need an API key?

No. Numbers Online — phone intelligence completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Numbers Online — phone intelligence?

It answers our handshake in 546 ms on average, which is faster than 26% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Numbers Online — phone intelligence open source?

Yes — it is published under the MIT licence and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.