dns-whois-mcp

FastMCP server for DNS lookups and WHOIS domain research. Part of the Palimpsest intelligence toolkit.

Tools

• dns_lookup — DNS record lookup (A, AAAA, MX, NS, TXT, SOA, CNAME, PTR, SRV, CAA, DS, DNSKEY). Returns JSON with resolved records.

• whois_lookup — WHOIS domain or IP query. Returns structured data (registrar, creation/expiry dates, name servers, registrant, DNSSEC) plus raw WHOIS text. Includes computed age_days.

• reverse_lookup — Reverse DNS (PTR) lookup for an IPv4 or IPv6 address.

• dns_research — Comprehensive domain investigation. Runs all DNS record types and WHOIS in parallel, then reverse-lookups every resolved IP. Consolidated JSON report.

Related MCP server: Lookup-Domain

Usage

Via stdio (MCP)

python -m dns_whois_mcp

Example

dns_research("magnalending.co.uk")

As a library

from dns_whois_mcp.server import _dns_lookup_sync, _whois_lookup_sync

print(_dns_lookup_sync("iana.org", "A"))
print(_whois_lookup_sync("iana.org"))

Storage

Every lookup is archived as a JSONL entry in ~/.local/share/dns-whois/YYYY-MM-DD-dns-whois.jsonl. Duplicates (same domain + same tool within the same hour) are skipped.

Each entry includes a human-readable content field for full-text search via fst-indexer and unified-history-mcp.

Dependencies

• Python ≥ 3.11

• mcp ≥ 1.0

• dnspython ≥ 2.7

• asyncwhois ≥ 1.0

Install

pip install -e .