# NetworkCalc > Network calculations: subnets, DNS lookups, and IP analysis. ## Website https://networkcalc.com ## Portal https://networkcalc.on.xpay.sh ## MCP Servers ### NetworkCalc Network calculations: subnets, DNS lookups, and IP analysis URL: https://networkcalc.mcp.xpay.sh/mcp?key=YOUR_XPAY_KEY Tools: - dns_lookup: Fetch DNS info for a given domain ($0.01/call) - whois_lookup: Fetch WHOIS info for a given domain ($0.01/call) - spf_lookup: Fetch SPF info for a given domain or host ($0.01/call) - certificate_info: Fetch certificate for a given domain ($0.01/call) - calculate_subnet: Fetch Subnet info for a given ipaddress/subnet/CIDR ($0.01/call) ## Get Started 1. Get an API key at https://networkcalc.on.xpay.sh/account/keys 2. Add the MCP server URL to your client config (Claude, Cursor, Windsurf) 3. Pay per tool call from your XPay wallet ## About Powered by XPay — pay-per-use API access for AI agents. https://xpay.sh