dnsprobe

dnsprobe runs DNS and email-security diagnostics against the free, keyless intodns.ai public API: full domain scans, DNS lookups, DNSSEC validation, propagation checks, WHOIS/RDAP, and the email authentication stack — SPF (including flattening), DKIM discovery, DMARC, BIMI, MTA-STS, and blacklist checks. It also parses DMARC aggregate reports and raw emails locally, and generates HTTP security-header sets locally. One binary serves a command-line interface and a stdio MCP server.

This is a labelled core subset: 21 of the tools named in the upstream README's tool tables are built. The named tools not built are nis2_quickscan, get_everything_report, create_report_snapshot, get_report_snapshot, start_deep_scan, get_deep_scan_status, cancel_deep_scan, check_tlsa_dane, check_smtp_tls, check_fcrdns, check_sender_requirements, create_email_test, get_email_test, poll_email_test, explain_issue, generate_dns_fix, check_http3, get_hall_of_fame, read_llm_discovery, get_citation_guidance, and scan_csp. (The upstream README headline says 45 tools; its six tables enumerate 42 named tools.)

No API key is needed. The site base URL can be overridden with DNSPROBE_SITE_URL; when it is not set, calls go to https://intodns.ai. Upstream endpoint paths are documented reconstructions from the site's visible /api/... conventions — the public spec documents tool names and descriptions, not paths.

Install

npx @reneturcios/dnsprobe get_health

Or run the container image:

docker run -i ghcr.io/cloudcorprecords/dnsprobe

The container defaults to the MCP server (see below). Pass CLI arguments to use it as a CLI instead.

Related MCP server: nslookup.io MCP Server

CLI

Subcommands mirror the MCP tool names:

dnsprobe scan_domain example.com
dnsprobe lookup_dns example.com --type MX
dnsprobe validate_dnssec example.com
dnsprobe whois_lookup example.com
dnsprobe check_spf example.com
dnsprobe check_email_security example.com
dnsprobe analyze_security_headers https://example.com
dnsprobe generate_security_headers --preset strict --format nginx
dnsprobe get_health
dnsprobe get_pdf_report_link example.com

dnsprobe --version

Commands print the upstream JSON payload, the locally computed result, or the built link. Exit codes: 0 on success, 1 when a call fails (including an upstream API error), 2 for usage errors.

Five tools never call the network: parse_dmarc_report parses a DMARC aggregate (RUA) XML report into structured metadata, policy, and per-record SPF/DKIM/DMARC results with message totals; analyze_raw_email parses raw MIME headers (with unfolding), extracts the Authentication-Results SPF/DKIM/DMARC verdicts, and counts Received hops; generate_security_headers renders a header set from the recommended, strict, or report-only preset as raw headers or nginx, Apache, Caddy, Cloudflare, or _headers config; get_pdf_report_link and get_badge_link build {base}/api/pdf/{domain} and {base}/api/badge/{domain}.

MCP server

One bin serves both faces. The mcp subcommand starts a stdio MCP server:

npx -y @reneturcios/dnsprobe mcp

MCP client configuration:

{
  "mcpServers": {
    "dnsprobe": {
      "command": "npx",
      "args": ["-y", "@reneturcios/dnsprobe", "mcp"]
    }
  }
}

To point the server at a different intodns.ai-compatible host, add DNSPROBE_SITE_URL to the client's env for this server.

Tools

Development

npm install
npm run build   # tsc -> dist/
npm test        # node test runner over test/*.test.ts, no network (fake fetch fixtures)
npm run dev     # run the CLI from source via tsx

License

MIT — see LICENSE.