dns_spf_chain

MCP tool from Osint MCP Server by badchars

Recursive SPF include chain resolution with service detection

How to use it

dns_spf_chain is exposed by the Osint MCP Server MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the dns_spf_chain tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install Osint MCP Server

$npx osint-mcp-server

FULL OSINT MCP SERVER LISTING

Other tools in Osint MCP Server (36)

ASN details + all announced IPv4/IPv6 prefixes

IP prefix/ASN routing lookup with RIR allocation

Prefix details + announcing ASNs

censys_certificates

Certificate search by domain, fingerprint, issuer

censys_host_details

Single host full details with all services

Host search — IPs, services, ports, location, ASN

Search CT logs via crt.sh — subdomain discovery + certificate details

dns_email_security

SPF + DMARC + DKIM analysis with risk scoring and recommendations

Resolve A, AAAA, MX, TXT, NS, SOA, CNAME, SRV records

Reverse DNS (PTR) lookup for an IP address

dns_srv_discover

SRV + CNAME service discovery (Autodiscover, LDAP, SIP, Kerberos, etc.)

dns_wildcard_check

Wildcard DNS detection via random subdomain probe

Batch IP geolocation (up to 100 IPs at once)

IP geolocation: country, city, ISP, ASN, proxy/hosting/VPN detection

hackertarget_aslookup

ASN information lookup

hackertarget_hostsearch

Host/subdomain discovery with resolved IPs

hackertarget_reverseip

Reverse IP lookup — find all domains on an IP

Discover M365 tenant ID, region, and OpenID configuration

Detect auth type (Managed/Federated), federation brand, auth endpoints

osint_domain_recon

Quick recon combining all free sources (DNS + WHOIS + crt.sh + HackerTarget + email security)

osint_list_sources

List all OSINT sources, API key status, and tool counts

shodan_dns_resolve

Bulk hostname-to-IP resolution via Shodan

shodan_exploits

Search public exploit database (PoC, Metasploit modules)

IP details: open ports, services, banners, vulnerabilities, OS, ASN

Search Shodan query language (e.g. apache port:443 country:US)

Historical DNS records with first/last seen dates

Subdomain enumeration (returns FQDNs)

Enhanced WHOIS with registrant/admin/technical contacts

Domain reputation, detection stats, categories, DNS records

IP reputation, detection stats, ASN, network

Subdomain enumeration via VirusTotal

URL scan + malware/phishing analysis

wayback_snapshots

Snapshot history with timestamps and direct archive links

Archived URL discovery — find old endpoints, hidden paths, removed content

RDAP domain lookup — registrar, dates, nameservers, contacts

RDAP IP lookup — network name, CIDR, country, entities