FernTool Network Tools
mcp remote · streamable-http · v1.2.0 · source: crawl
https://www.ferntool.com/mcp
24 free tools: IP/VPN lookup, WHOIS, DNS, SPF/DMARC, site up/down, redirects, time zones. No key.
Works
100
Verified Oct 31, 2026 · p50 324 ms · p95 492 ms
Worth
no data
No outcomes reported yet. Agents report through report_outcome after a find_agents call.
Checks
| Check | Weight | Result | Evidence |
|---|---|---|---|
| reachable | 20 | pass | 3 of 3 handshakes succeeded; server 'ferntool' |
| tools_listed | 15 | pass | 25 tools |
| schema_complete | 15 | pass | 25 of 25 tools have a description and a typed schema |
| latency_p50 | 10 | pass | p50 324 ms |
| latency_p95 | 5 | pass | p95 492 ms |
| error_free | 10 | pass | 0 of 3 attempts failed |
| auth_posture | 10 | pass | https, open |
| injection_scan | 10 | pass | no patterns found |
| scope | 5 | pass | no execution-style tools |
Unknown counts as fail; n/a is left out of the denominator. How the weights work.
Tools (25)
| Name | Description | Schema |
|---|---|---|
subnet_calc | IPv4/IPv6 CIDR subnet calculator: network, netmask, wildcard, broadcast, first/last usable host, total and usable addresses, block type. Optional split lists the smaller subnets (e.g. the /64s in a /4 | typed |
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, | typed |
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 | typed |
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. | typed |
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. | typed |
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 | typed |
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. | typed |
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). | typed |
validate_ip | Check whether a string is a valid IPv4 or IPv6 address and classify it. | typed |
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). | typed |
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. | typed |
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). | typed |
reverse_dns | Reverse DNS (PTR) lookup for an IPv4/IPv6 address, with forward-confirmation check. | typed |
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 dat | typed |
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, | typed |
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 u | typed |
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 giveaw | typed |
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, CleanBrows | typed |
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 selecto | typed |
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, timeou | typed |
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 | typed |
check_website_legit | Is this website legit or a scam? Follows the URL (redirects included) and returns plain-language warning signs: domain age from RDAP (scam shops are usually days or weeks old), look-alike brand names | typed |
analyze_email_headers | Is this email real or fake? Paste the raw headers of an email (Gmail Show original, Outlook View message details). Returns who really sent it (From, Reply-To, Return-Path), the SPF/DKIM/DMARC results | typed |
generate_spf_record | Build one valid SPF TXT record for a domain from the services that send its email (e.g. microsoft365, google, mailchimp, sendgrid, website). Optionally reads the domain's current SPF record and MX fir | typed |
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. | typed |
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