INDIVIDUAL MCP TOOL

date_calc

Exact calendar maths.

ferntool.comnone authenticationAvailability not checked

LIVE ENDPOINT

https://www.ferntool.com/mcp

No auth detected

Connect to this endpoint to inspect the live schema for date_calc and invoke it with your own arguments.

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Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

CONNECT WITH APPROVAL

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.ferntool]
url = "https://www.ferntool.com/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "ferntool": {
      "type": "http",
      "url": "https://www.ferntool.com/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: ferntool
Remote MCP URL: https://www.ferntool.com/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "ferntool": {
      "url": "https://www.ferntool.com/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "ferntool": {
      "type": "http",
      "url": "https://www.ferntool.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "ferntool",
  "transport": "streamable-http",
  "url": "https://www.ferntool.com/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

get_my_ip — Return the public IP address (and ISP, ASN, location, timezone) of the caller as seen by FernTool.
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).
validate_ip — Check whether a string is a valid IPv4 or IPv6 address and classify it.
batch_lookup_ip — Look up 1-100 IPv4/IPv6 addresses at once.
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.
dns_lookup — Resolve DNS records for a domain via Cloudflare 1.1.1.1 DNS-over-HTTPS.
reverse_dns — Reverse DNS (PTR) lookup for an IPv4/IPv6 address, with forward-confirmation check.
subnet_calc — IPv4/IPv6 CIDR subnet calculator: network, netmask, wildcard, broadcast, first/last usable host, total and usable addresses, block type.