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Which MCP servers are Ip's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

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Whose server it is
  • Registry namels.ip/ipls-ip-lookup-serviceverified in the MCP registry

The registry name sits under ip.ls. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools6
  • Server calls itselfIP Lookup Service (ipls)
  • Server version1.4.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 32 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: look up city, ISP and ASN for an IP address; check DNS records for a domain.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • For "look up city, ISP and ASN for an IP address", the likely first call is ip_lookup.
  • For "check DNS records for a domain", the likely first call is ip_resolved.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 2, the first on 2026-10-26
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer56 ms
  • Space in an agent's context≈ 901 tokensthe definitions of all its tools (6), which an agent carries on every turn
  • Tool definitionsA · 97 of 100
  • Typed results0 of 6 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 6

What an agent can do with it

  • can do · look up city, ISP and ASN for an IP address
  • can do · check DNS records for a domain
  • not sure · summarize country and ASN distribution in web logs

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers6 tools · read 2026-10-26
  • ip_lookup

    Look up geolocation, ISP and network info for any IPv4/IPv6 address or hostname, or an array of them for batch lookup. Returns ip, city, region, country, coordinates, ASN/ISP, timezone and continent (full name, e.g. North America); when a…

  • ip_resolved

    Resolve a domain to all its A and AAAA records (deduplicated, up to 6) and return geolocation for each address. Returns an array of { ip, protocol, domain, city, region, country, coordinates, ASN/ISP, ... }. For a bare IP, returns a…

  • ip_self

    Get geolocation and network info about the caller's own public IP, plus the protocol stack (IPv4/IPv6) of the current connection. On dual-stack machines the stack is chosen by the client and may differ from `curl ip.ls`, which picks a…

  • headers

    Return all HTTP request headers as seen by the IP.LS server (including X-Real-IP / X-Forwarded-For injected by the frontend proxy). Useful for debugging proxies and client identity.

  • ua

    Return the User-Agent string of the current HTTP client.

  • ip_summary

    Summarize a large batch of IPs into distributions by country, continent, ASN/operator and network prefix, each bucket with a sample of addresses. Use instead of ip_lookup once the input is in the hundreds or thousands — ip_lookup returns…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "ipls-ip-lookup-service": {
      "type": "http",
      "url": "https://ip.ls/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http ip https://ip.ls/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://ip.ls/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.