mcp

# [<img src="https://s3.vpndetection.io/vpndetection-public/brand/mark.svg" alt="VPNDetection" height="28"/>](https://vpndetection.io/) VPNDetection MCP Server

[![npm](https://img.shields.io/npm/v/vpndetection-mcp.svg)](https://www.npmjs.com/package/vpndetection-mcp)
[![license](https://img.shields.io/npm/l/vpndetection-mcp.svg)](LICENSE)

The official [Model Context Protocol](https://modelcontextprotocol.io) server for the [VPNDetection](https://vpndetection.io) API.

It gives an AI agent seven read-only tools for anonymity detection: whether an address belongs to a VPN, a residential, datacenter, mobile or public proxy, a Tor node, a privacy relay or web gateway, a hosting provider or a CDN, plus the database catalog and where your organization's license for each one stands.

## Getting Started

We host it at `https://mcp.vpndetection.io/mcp`, and you sign in to it with your VPNDetection account. It also runs on your own machine from npm.

### In Claude

In claude.ai, the desktop app or Cowork, add `https://mcp.vpndetection.io/mcp` as a custom connector and choose **Use Claude's published identity** when asked. In Claude Code, install our plugin, which adds the server with skills:

```console
/plugin marketplace add vpndetection-io/claude-plugin
/plugin install vpndetection@vpndetection
```

Either way you sign in with your VPNDetection account, and Claude never sees your API key. The steps, the skills and how to disconnect: [docs.vpndetection.io/integrations/claude](https://docs.vpndetection.io/integrations/claude).

### In ChatGPT and Codex

In ChatGPT on the web, add `https://mcp.vpndetection.io/mcp` as a custom MCP server under Plugins and choose OAuth. In Codex, install our plugin, which adds the server with skills:

```console
codex plugin marketplace add vpndetection-io/openai-plugin
codex plugin add vpndetection@vpndetection
codex mcp login vpndetection
```

Either way you sign in with your VPNDetection account, and neither sees your API key. The steps: [docs.vpndetection.io/integrations/chatgpt](https://docs.vpndetection.io/integrations/chatgpt) and [docs.vpndetection.io/integrations/codex](https://docs.vpndetection.io/integrations/codex). On the OpenAI API, the Responses API's `mcp` tool takes the server as its `server_url` and your key as its `authorization`.

### In any other MCP client

Point it at `https://mcp.vpndetection.io/mcp`. A client that supports MCP authorization signs in the same way. One that doesn't can send a key instead, as `Authorization: Bearer your-key`.

### On your own machine

**No API key needed to start.** The free tier answers `ip` and `is_vpn`, and allows 1000 requests per day per source address.

Add this to your MCP client's config:

```json
{
  "mcpServers": {
    "vpndetection": {
      "command": "npx",
      "args": ["-y", "vpndetection-mcp"]
    }
  }
}
```

Requires Node.js 22 or newer.

A key unlocks the provider name, the classification databases and the proxy families. Put it in the environment:

```json
{
  "mcpServers": {
    "vpndetection": {
      "command": "npx",
      "args": ["-y", "vpndetection-mcp"],
      "env": { "VPNDETECTION_API_KEY": "your-key" }
    }
  }
}
```

`VPNDETECTION_BASE_URL` overrides the endpoint if you need to point somewhere else.

## Tools

| Tool | What it answers |
|---|---|
| `lookup_ip` | Classify one address. |
| `lookup_ips` | Classify a whole list of addresses in one call, keyed by address. A long list is batched for you. |
| `my_entitlement` | What this key is entitled to and what it has spent: plan, field tier, requests so far, allowance, and when it resets. |
| `list_databases` | Every database we publish, with its `standing` for your organization: `licensed`, `expired` or `unlicensed`. |
| `database_metadata` | A database's columns, sample rows, row count, build date and file sizes. |
| `database_checksum` | The published digests for one database file. |
| `list_downloads` | Your organization's recent download attempts, refusals included. |

The database tools need a key with the `db.download` scope, which your organization's `Default` key has.

Every tool is read-only. There is deliberately no download tool: the databases run to several GB, which is not something an agent should pull into a conversation. Fetch them with the [client libraries](https://github.com/vpndetection-io) or the API instead.

**There is deliberately no `my_ip` tool, although every client library has one.** Over a hosted transport the address our edge observes belongs to whatever proxied the call - Claude's infrastructure, not the person asking - so the tool would answer confidently and wrongly for the only reading anyone would put on it. `my_entitlement` has no such problem and is the same answer from any transport, because it describes the credential rather than the connection. A test pins the tool's absence so it cannot be added back by accident.

Usage counts against the anniversary of the subscription, not the calendar month and not the billing period. A null `hard_limit` means we never stop serving; it is not a limit of zero.

## Reading a result

Each lookup comes back with a `coverage` block beside it:

```json
{
  "result": { "ip": "45.83.91.1", "is_vpn": true },
  "coverage": {
    "included": ["ip", "is_vpn"],
    "not_included": ["is_hosting", "is_tor", "hosting", "tor", "..."],
    "note": "The fields in not_included were not returned, because this API key's plan does not include them. ..."
  }
}
```

This matters more here than in a normal client library. A field missing from a result means your plan doesn't include it, never "we checked and found nothing" - and a model reading the result on its own will otherwise treat the absence as a negative answer. `coverage` states the difference explicitly so it can't.

## Other Libraries

There are official VPNDetection client libraries available for many languages including PHP, Python, Go, Java, Ruby, and many popular frameworks such as Django, Rails, and Laravel. See our GitHub at https://github.com/vpndetection-io for more.

## About VPNDetection

VPN Detection API: Accurate anonymity detection identifying VPNs, residential proxies, hosting servers, Tor nodes, CDNs, relays and more.

[<img src="https://s3.vpndetection.io/vpndetection-public/brand/mark.svg" alt="VPNDetection" height="64"/>](https://vpndetection.io/)

## License

This project is licensed under the [MIT License](LICENSE).