Look up IP addresses and AS numbers for VPN, proxy, Tor, owner and abuse contact in ipapi.is. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the ipapi.is connector, then ask in plain words. The AI picks the tools.
For security, fraud and support teams that check IP addresses with an ipapi.is account.
Look up one IPv4 or IPv6 address. Read the flags for VPN, proxy, Tor exit, datacenter, abuser, mobile and crawler.
Look up an address to see the owner company, the network and the abuse contact. Use it to report an attack to the right team.
Send up to 100 IP addresses in one request. Ask the assistant to list the risky addresses and say why each one is risky.
Read the organization, registry, type, country and announced routes of an autonomous system. Use it to see who runs a network.
The login page asks for your ipapi.is API key.
Copy the API key from your ipapi.is dashboard. You use your own ipapi.is account, so your own quota and plan apply: every lookup spends one request of your quota, also the login check. By connecting, you appoint usefulapi as your outsourcing provider under the ipapi.is connection terms: it acts only for you, keeps no ipapi.is data and does not reuse it. The IP addresses you ask about pass to your AI client and its LLM provider. These tools only read data. API requests use HTTPS only and are never retried. Regenerate the key in ipapi.is to stop access; a new key starts a new usage and billing identity.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"ipapi-is": {
"url": "https://ipapi-is.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"ipapi-is": {
"type": "http",
"url": "https://ipapi-is.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your ipapi.is API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this ipapi.is server only. Ask your AI to run ipapi_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with ipapi_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with ipapi_upgrade before then undoes the cancel. Or write to [email protected].
ipapi_lookup_ipipapi_lookup_asnipapi_bulk_lookupipapi_usage_statusipapi_request_featureipapi_upgradeipapi_cancel_subscriptionCheck if an IP is a VPN, proxy, Tor or datacenter address. Find the owner and abuse contact of an IP. Screen a list of IPs from your login logs. Look up an AS number and its routes. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by ipapi.is. The server calls the ipapi.is API with your own ipapi.is access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
The login page asks for your ipapi.is API key. See Before you connect for where to find it.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your ipapi.is API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the ipapi.is API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in ipapi.is.
All 3 ipapi.is tools are marked read-only.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this ipapi.is server only. Cancel any time: your paid plan then runs to the end of the paid period. Run ipapi_usage_status to see how many calls you used.
Ask the AI to run ipapi_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run ipapi_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with ipapi_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.