nslookup — Claude Code MCP server: DNS and setup
nslookup gives AI agents DNS lookups, SSL checks, and domain security scans. Use it to inspect sites or access nslookup.io monitoring data.
claude mcp add --transport http nslookup https://mcp.nslookup.io/mcpWhat nslookup does
This MCP server connects an agent to nslookup.io tools for DNS records, SSL certificates, security scans, GEO scoring, domain intelligence, and uptime checks. The public tools work anonymously, with no account or API key.
You can use a hosted Streamable HTTP endpoint or run the server locally through npx over stdio. The local option requires Node.js 18+. The my_ tools expose monitoring-account data only through the hosted connection and require browser sign-in. Register one nslookup entry only, since using hosted and local entries together can route calls unpredictably.
What it helps with
- inspect a domain’s DNS records
- check an SSL certificate
- scan a domain for security issues
- score a site for GEO readiness
- review nslookup.io monitoring data
Example prompts for the agent
- Run a DNS check for
github.comand explain the results. - Check the SSL certificate and security status of
example.com. - Show my nslookup.io monitoring overview.
How to install nslookup
1Platform CLI: remote server
claude mcp add --transport http nslookup https://mcp.nslookup.io/mcp2Platform CLI
claude mcp add nslookup -- npx -y @nslookup-io/mcp-server1Platform CLI: remote server
codex mcp add nslookup --url https://mcp.nslookup.io/mcp2Platform CLI
codex mcp add nslookup -- npx -y @nslookup-io/mcp-serverConfig file
{
"mcpServers": {
"nslookup": {
"url": "https://mcp.nslookup.io/mcp"
}
}
}{
"mcpServers": {
"nslookup": {
"command": "npx",
"args": [
"-y",
"@nslookup-io/mcp-server"
]
}
}
}Config file
{
"servers": {
"nslookup": {
"type": "http",
"url": "https://mcp.nslookup.io/mcp"
}
}
}{
"servers": {
"nslookup": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@nslookup-io/mcp-server"
]
}
}
}1Platform CLI: remote server
gemini mcp add -t http nslookup https://mcp.nslookup.io/mcp2Platform CLI
gemini mcp add nslookup npx -y @nslookup-io/mcp-serverStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about nslookup
How do I install nslookup in Claude Code?
For the hosted connection, run claude mcp add --transport http nslookup https://mcp.nslookup.io/mcp. This route is required for access to monitoring-account data.
What does nslookup do?
It gives an AI agent nslookup.io tools for DNS lookups, SSL inspection, security scans, GEO scoring, domain intelligence, and uptime checks.
Does nslookup require an API key?
The public tools work without an account or API key. The my_ tools require browser sign-in through the hosted server, and they are unavailable in local mode.
