Servers Playground How we check Add a server Log in

FernTool IP Lookup

Working · 2.5 s

com.ferntool/ipv1.1.0 Domain verified

IP lookup with VPN/Tor/datacenter flags, batch lookup, WHOIS (RDAP), DNS, reverse DNS, subnet math.

Security Utilities

Source Website Registry entry

Maintain this server? Claim it

Try it

Call this server's tools from your browser. Nothing to install.

https://www.ferntool.com/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

ai_service_status

Live status of AI services (ChatGPT/OpenAI, Claude, Gemini API, GitHub Copilot, Perplexity, Cohere) read from their official status pages, cached ~60s. level is up, degraded, down or unknown.

servicestring

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

I understand, run it anyway

FernTool IP Lookup MCP server | mcptry

Tools (22)

Tool list last changed Oct 25, 2026.

ai_service_status

Live status of AI services (ChatGPT/OpenAI, Claude, Gemini API, GitHub Copilot, Perplexity, Cohere) read from their official status pages, cached ~60s. level is up, degraded, down or unknown.

Argument	Type	Description
service	string

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "service": {
      "enum": [
        "chatgpt",
        "claude",
        "gemini",
        "copilot",
        "perplexity",
        "cohere"
      ],
      "type": "string"
    }
  }
}

batch_lookup_ip

Look up 1-100 IPv4/IPv6 addresses at once. Each result has version, scope, country, timezone, ASN, network owner and flags (is_tor, is_datacenter, provider).

Argument	Type	Description
ips*	array

Input schema (JSON)

{
  "type": "object",
  "required": [
    "ips"
  ],
  "properties": {
    "ips": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "minItems": 1
    }
  }
}

check_dns_propagation

Check whether a DNS change has spread: asks the domain's own authoritative name server (when reachable) and 8 big public resolvers (Cloudflare, Google, OpenDNS, AdGuard, NextDNS, Control D, CleanBrowsing, AliDNS) over DoH, marks which are up to date, and gives the remaining cache time (TTL) of stale answers.

Argument	Type	Description
type	string	default A
domain*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "domain"
  ],
  "properties": {
    "type": {
      "enum": [
        "A",
        "AAAA",
        "CNAME",
        "MX",
        "TXT",
        "NS"
      ],
      "type": "string",
      "description": "default A"
    },
    "domain": {
      "type": "string"
    }
  }
}

check_email_security

Can someone fake (spoof) email from a domain? Reads SPF (counts the 10 DNS-lookup limit, follows includes), DMARC (policy, pct, reports, inherited from the parent domain) and DKIM keys (common selectors, or the one given), detects the email provider from MX, and returns a plain verdict (protected / partial / unprotected) plus the exact TXT records to add.

Argument	Type	Description
domain*	string	Domain or email address, e.g. example.com or [email protected]
selector	string	Optional DKIM selector, e.g. google or selector1

Input schema (JSON)

{
  "type": "object",
  "required": [
    "domain"
  ],
  "properties": {
    "domain": {
      "type": "string",
      "description": "Domain or email address, e.g. example.com or [email protected]"
    },
    "selector": {
      "type": "string",
      "description": "Optional DKIM selector, e.g. google or selector1"
    }
  }
}

check_website_status

Is a website down? Resolves its DNS and loads the URL once (10 s timeout) from FernTool's Cloudflare edge, then returns verdict (up/down), reason (ok, blocked_bot, page_not_found, server_error, timeout, tls, dns_nxdomain...), HTTP status, response time, final URL after redirects and server country/network. One vantage point only; results cached 30 s.

Argument	Type	Description
url*	string	Website address, e.g. example.com or https://example.com/page

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "Website address, e.g. example.com or https://example.com/page"
    }
  }
}

convert_timestamp

Convert a Unix timestamp (seconds, milliseconds, microseconds or nanoseconds, auto-detected) to a readable date, or a date/time string (e.g. 2026-12-25 09:00, read in the given time zone unless it has its own offset) to a Unix timestamp. Also returns weekday, ISO week and how long ago or until.

Argument	Type	Description
value*	string	Timestamp like 1760000000 or a date like 2026-12-25T09:00
timezone	string	IANA time zone for display and for dates without an offset (default UTC)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "value"
  ],
  "properties": {
    "value": {
      "type": "string",
      "description": "Timestamp like 1760000000 or a date like 2026-12-25T09:00"
    },
    "timezone": {
      "type": "string",
      "description": "IANA time zone for display and for dates without an offset (default UTC)"
    }
  }
}

convert_timezone

Convert a time between time zones with daylight saving applied (you cannot do this reliably yourself). from/to accept IANA zones (Africa/Johannesburg), common abbreviations (SAST, EST, PST, GMT, CET, IST=India, CST=US Central) or big cities. Omit time for now. Returns each local date, time, UTC offset, abbreviation, hour difference and whether it is the next/previous day.

Argument	Type	Description
to*	array	Target zones
from	string	Source zone (default UTC)
time	string	e.g. 2026-12-25 09:00, 14:30 or 2:30pm (today in from); omit for now

Input schema (JSON)

{
  "type": "object",
  "required": [
    "to"
  ],
  "properties": {
    "to": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 20,
      "minItems": 1,
      "description": "Target zones"
    },
    "from": {
      "type": "string",
      "description": "Source zone (default UTC)"
    },
    "time": {
      "type": "string",
      "description": "e.g. 2026-12-25 09:00, 14:30 or 2:30pm (today in from); omit for now"
    }
  }
}

count_words

Exactly count words, characters (with and without spaces), sentences and paragraphs in a text, with reading/speaking time and the most repeated words. Use this instead of estimating counts yourself.

Argument	Type	Description
text*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string"
    }
  }
}

date_calc

Exact calendar maths. With end: days between two dates (plus weeks, months+days, weekdays Mon-Fri, weekend days). With add_days/add_weeks/add_months/add_years (negative to subtract): the resulting date and weekday; business_days=true skips weekends. Use this instead of counting days yourself.

Argument	Type	Description
end	string	YYYY-MM-DD
start	string	YYYY-MM-DD (default: today in timezone)
add_days	integer
timezone	string	IANA zone used for today when start is omitted (default UTC)
add_weeks	integer
add_years	integer
add_months	integer
include_end	boolean	Count the end date too (default false)
business_days	boolean	add_days counts Monday-Friday only

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "end": {
      "type": "string",
      "description": "YYYY-MM-DD"
    },
    "start": {
      "type": "string",
      "description": "YYYY-MM-DD (default: today in timezone)"
    },
    "add_days": {
      "type": "integer"
    },
    "timezone": {
      "type": "string",
      "description": "IANA zone used for today when start is omitted (default UTC)"
    },
    "add_weeks": {
      "type": "integer"
    },
    "add_years": {
      "type": "integer"
    },
    "add_months": {
      "type": "integer"
    },
    "include_end": {
      "type": "boolean",
      "description": "Count the end date too (default false)"
    },
    "business_days": {
      "type": "boolean",
      "description": "add_days counts Monday-Friday only"
    }
  }
}

dns_lookup

Resolve DNS records for a domain via Cloudflare 1.1.1.1 DNS-over-HTTPS. Types: A, AAAA, MX, TXT, NS, CNAME, SOA (default: all).

Argument	Type	Description
types	array
domain*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "domain"
  ],
  "properties": {
    "types": {
      "type": "array",
      "items": {
        "enum": [
          "A",
          "AAAA",
          "MX",
          "TXT",
          "NS",
          "CNAME",
          "SOA"
        ],
        "type": "string"
      }
    },
    "domain": {
      "type": "string"
    }
  }
}

estimate_ai_cost

Estimate token count and USD API cost of a text across major AI models (OpenAI GPT, Anthropic Claude, Google Gemini), and whether it fits each context window. Token counts are approximate. Pass text, or tokens directly.

Argument	Type	Description
text	string
tokens	integer
output_tokens	integer	Expected reply length in tokens (default: same as input)

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string"
    },
    "tokens": {
      "type": "integer",
      "minimum": 1
    },
    "output_tokens": {
      "type": "integer",
      "minimum": 0,
      "description": "Expected reply length in tokens (default: same as input)"
    }
  }
}

get_current_time

Get the exact current date and time (you cannot know it otherwise). Returns Unix seconds and milliseconds, ISO 8601 in UTC and in the requested IANA time zone, weekday, ISO week and day of year.

Argument	Type	Description
timezone	string	IANA time zone, e.g. Africa/Johannesburg or America/New_York (default UTC)

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "timezone": {
      "type": "string",
      "description": "IANA time zone, e.g. Africa/Johannesburg or America/New_York (default UTC)"
    }
  }
}

get_my_ip

Return the public IP address (and ISP, ASN, location, timezone) of the caller as seen by FernTool. Note: for remote agents this is the IP of the machine calling the MCP server.

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

lookup_ip

Validate an IPv4/IPv6 address and return its version, scope (public/private/loopback/...), country, ASN and network owner (DB-IP Lite + IPtoASN data).

Argument	Type	Description
ip*	string	IPv4 or IPv6 address

Input schema (JSON)

{
  "type": "object",
  "required": [
    "ip"
  ],
  "properties": {
    "ip": {
      "type": "string",
      "description": "IPv4 or IPv6 address"
    }
  }
}

make_qr_code

Create a static QR code (never expires) for a URL, Wi-Fi string (WIFI:T:WPA;S:name;P:pass;;), mailto:, tel: or any text up to 2000 characters. Returns an SVG string plus a ferntool.com image URL that renders the same code.

Argument	Type	Description
ecc	string	Error correction (default M)
text*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "ecc": {
      "enum": [
        "L",
        "M",
        "Q",
        "H"
      ],
      "type": "string",
      "description": "Error correction (default M)"
    },
    "text": {
      "type": "string"
    }
  }
}

pick_random

Fairly pick random winners from a list, shuffle a list, or split people into random even teams, using a cryptographically secure generator (you cannot choose fairly at random yourself). Use for giveaways, raffles, "who goes first", random order or team splits. An item listed twice has twice the chance unless dedupe=true.

Argument	Type	Description
mode	string	default pick
count	integer	How many winners for mode=pick (default 1, never repeats an entry)
items*	array	The names or items
teams	integer	Number of teams for mode=teams (default 2)
dedupe	boolean	Remove duplicate entries first (case-insensitive)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "items"
  ],
  "properties": {
    "mode": {
      "enum": [
        "pick",
        "shuffle",
        "teams"
      ],
      "type": "string",
      "description": "default pick"
    },
    "count": {
      "type": "integer",
      "minimum": 1,
      "description": "How many winners for mode=pick (default 1, never repeats an entry)"
    },
    "items": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 10000,
      "minItems": 1,
      "description": "The names or items"
    },
    "teams": {
      "type": "integer",
      "minimum": 2,
      "description": "Number of teams for mode=teams (default 2)"
    },
    "dedupe": {
      "type": "boolean",
      "description": "Remove duplicate entries first (case-insensitive)"
    }
  }
}

random_number

Fair, cryptographically secure random integers (you cannot produce real randomness yourself). min and max are inclusive. unique=true for no repeats (raffles, lotto, picking winners). For a coin flip use min 0, max 1; for dice use min 1, max 6.

Argument	Type	Description
max	integer	default 100
min	integer	default 1
sort	string
count	integer	default 1
unique	boolean

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "max": {
      "type": "integer",
      "description": "default 100"
    },
    "min": {
      "type": "integer",
      "description": "default 1"
    },
    "sort": {
      "enum": [
        "asc",
        "desc"
      ],
      "type": "string"
    },
    "count": {
      "type": "integer",
      "maximum": 1000,
      "minimum": 1,
      "description": "default 1"
    },
    "unique": {
      "type": "boolean"
    }
  }
}

reverse_dns

Reverse DNS (PTR) lookup for an IPv4/IPv6 address, with forward-confirmation check.

Argument	Type	Description
ip*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "ip"
  ],
  "properties": {
    "ip": {
      "type": "string"
    }
  }
}

subnet_calc

IPv4/IPv6 CIDR subnet calculator: network, netmask, wildcard, broadcast, first/last usable host, total and usable addresses, block type.

Argument	Type	Description
cidr*	string	e.g. 192.168.1.0/24 or 2001:db8::/48

Input schema (JSON)

{
  "type": "object",
  "required": [
    "cidr"
  ],
  "properties": {
    "cidr": {
      "type": "string",
      "description": "e.g. 192.168.1.0/24 or 2001:db8::/48"
    }
  }
}

trace_redirects

Where does a link really go? Follows a URL (short links like bit.ly, tracking links, QR code links) hop by hop without a browser: every redirect with status code (301/302/307/308/meta refresh), final URL and page title, plus warning signs (ends on a different site, domain registered < 30 days ago, punycode look-alike name, bare IP, no HTTPS, loops, long chains) and a copy of the final URL with tracking parameters removed. Does not scan pages for malware. Max 10 hops; cached 60 s.

Argument	Type	Description
url*	string	The link to check, e.g. bit.ly/abc123 or https://example.com/page

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "description": "The link to check, e.g. bit.ly/abc123 or https://example.com/page"
    }
  }
}

validate_ip

Check whether a string is a valid IPv4 or IPv6 address and classify it.

Argument	Type	Description
ip*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "ip"
  ],
  "properties": {
    "ip": {
      "type": "string"
    }
  }
}

whois_lookup

WHOIS via RDAP for a domain (registrar, created/expiry dates, status, nameservers, DNSSEC), an IP address (network name, range, owner org, country, abuse contact) or an ASN like AS13335.

Argument	Type	Description
query*	string	Domain, IPv4/IPv6 address, or ASN (e.g. AS13335)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string",
      "description": "Domain, IPv4/IPv6 address, or ASN (e.g. AS13335)"
    }
  }
}