recon-tool 0.6.0

Domain intelligence CLI and MCP server — tech stack, email security, and signal intelligence from DNS.

recon

Passive infrastructure intelligence for humans and agents. Turns public DNS, identity endpoints, and certificate transparency into structured organizational intelligence — no credentials, no API keys, no interaction with the queried organization's systems.

Intended for defensive use only. recon is designed for legitimate security posture assessment, IT architecture review, vendor due diligence, and defensive hardening. It performs zero active scanning, zero credentialed access, and zero interaction with the queried organization's systems. See docs/legal.md for full intended-use policy and disclaimers.

recon contoso.com

╭──────────────────────────── Contoso Ltd ─────────────────────────────╮
│                                                                      │
│  Company:    Contoso Ltd                                             │
│  Domain:     contoso.onmicrosoft.com                                 │
│  Provider:   Microsoft 365 + Google Workspace                        │
│  Tenant ID:  a1b2c3d4-e5f6-7890-abcd-ef1234567890                    │
│  Region:     NA                                                      │
│  Auth:       Managed                                                 │
│  GWS Auth:   Managed                                                 │
│  Confidence: ●●● High (4 sources)                                    │
│  Services:   AWS CloudFront, AWS Elastic Load Balancer,              │
│              DKIM (Exchange Online), Google (site verified),         │
│              Google Workspace, Imperva (Incapsula), Microsoft 365,   │
│              Okta, Salesforce Marketing Cloud                        │
│                                                                      │
│  Insights:   Cloud-managed identity indicators (Entra ID native)     │
│              Google Workspace: Managed identity (Google-native)       │
│              Email security 2/5 moderate (DMARC reject, DKIM)        │
│              Dual provider: Google + Microsoft coexistence            │
│              Security stack: Okta (identity), Imperva (WAF)          │
│              Enterprise Security Stack: okta, imperva                │
│              Multi-Cloud: aws-cloudfront, aws-elb                    │
│              Dual Email Provider: microsoft365, google-workspace     │
│              Google-Native Identity: google-workspace, google-site,  │
│              google-managed                                          │
│                                                                      │
│  Certs:      280 total, 10 in last 90d, 3 issuers (DigiCert,        │
│              Entrust, Sectigo)                                       │
│                                                                      │
│  Related:    api.contoso.com, cdn.contoso.com, dev.contoso.com,      │
│              shop.contoso.com, staging.contoso.com                   │
│                                                                      │
╰──────────────────────────────────────────────────────────────────────╯

This example is based on the structure and density of a real Fortune 500 lookup, with all identifying details replaced using Microsoft's standard fictional company names (Contoso, Northwind Traders, Fabrikam, etc.). Tenant IDs, domains, and service lists are fabricated. No real company is depicted.

Give it a domain. No credentials, no API keys, no interaction with the organization's servers. recon queries public DNS, identity endpoints, and certificate transparency logs — the signals every organization must emit for email, SaaS, and cloud infrastructure to function — and assembles them into a coherent picture of the organization's technology posture.

Each signal alone is unremarkable: a TXT record here, a CNAME delegation there, a certificate issuer pattern in the CT logs. The art is in the correlation. recon reads these scattered, public signals across orthogonal sources (OIDC discovery, GetUserRealm, Google identity routing, DNS fingerprints, certificate transparency) and synthesizes them into structured intelligence — tenant details, email security posture, SaaS fingerprints, derived signals, hardening gaps, and posture scores. The organization is never contacted or notified.

Works for Microsoft 365, Google Workspace, or any provider. No accounts, no API keys, no credentials — ever. Every data source the tool queries is public and unauthenticated by design. The organization's servers never receive a packet; the intermediary services (DNS resolvers, Microsoft/Google identity endpoints, certificate transparency logs) are queried directly. Useful for anyone who needs domain intelligence — defenders, IT architects, MSPs, security professionals, sales engineers, and researchers. Also runs as an MCP server for AI agents.

Why recon?

	recon	dig / nslookup	whatweb	dnsrecon	cloud_enum	Paid tools
Zero credentials	✓	✓	✓	✓	✓	✗
M365 tenant detection	✓	✗	✗	✗	partial	varies
Google Workspace detection	✓	✗	✗	✗	✗	varies
Email security scoring	✓	✗	✗	✗	✗	varies
SaaS fingerprinting (187)	✓	✗	partial	✗	✗	✓
Signal intelligence	✓	✗	✗	✗	✗	✗
Certificate intelligence	✓	✗	✗	✗	✗	varies
Posture analysis	✓	✗	✗	✗	✗	✗
Security posture scoring	✓	✗	✗	✗	✗	varies
Delta / change detection	✓	✗	✗	✗	✗	✗
Recursive domain chaining	✓	✗	✗	partial	✗	varies
MCP server for AI agents	✓	✗	✗	✗	✗	✗
Extensible (custom YAML)	✓	✗	✗	✗	✗	✗

recon reads the organizational metadata layer — DNS records, identity endpoints, and certificate transparency logs that companies publish to make their email, SaaS, and security infrastructure work. It doesn't scrape websites, probe servers, or analyze page content. It turns infrastructure signals into business intelligence.

Vision

recon is designed to become the leading passive intelligence platform for organizational technology and security posture. It works by systematically collecting and correlating the public signals every organization must emit for email, SaaS, cloud services, and identity systems to function — DNS records, certificate transparency logs, and unauthenticated identity endpoints.

From these signals, recon builds a structured, evidence-based model of the organization's actual infrastructure — not the glossy version in marketing materials, but the real one revealed by observable configuration choices, historical patterns, and inconsistencies.

Where it's heading: timeline reconstruction from certificate issuance patterns, dependency and relationship mapping across CNAME delegations and SPF include chains, explainable intelligence with full provenance for every finding, and switchable interpretive lenses (defensive security, vendor due diligence, M&A assessment, operational maturity). All extensible through community-contributed YAML profiles for vertical-specific logic.

For human users today — defenders, IT architects, security professionals, sales engineers, researchers, and anyone who needs organizational intelligence — recon provides immediate value: a 30-second lookup gives a clear picture of an organization's real tech stack, email security maturity, identity providers, SaaS footprint, and hardening gaps. For AI agents, recon is already exposed as a clean MCP server, giving any MCP-compatible agent structured, traceable, JSON-ready intelligence without credentials or active scanning.

All of this remains strictly passive: zero credentials, zero active scanning, zero interaction with the queried organization's systems.

Install

Requires Python 3.10+.

pip install recon-tool                    # from PyPI
pip install -e .                          # or from source
recon doctor                              # verify connectivity

Usage

recon northwindtraders.com                # default panel output
recon northwindtraders.com --json         # structured JSON
recon northwindtraders.com --md           # markdown report
recon northwindtraders.com --full         # everything (services + domains + posture)
recon northwindtraders.com --services     # M365 vs GWS vs tech stack split
recon northwindtraders.com --posture      # neutral posture observations
recon northwindtraders.com --compare prev.json  # delta: what changed since last run
recon northwindtraders.com --chain --depth 2    # recursive domain discovery
recon northwindtraders.com --no-cache     # bypass disk cache
recon northwindtraders.com --exposure     # security posture assessment
recon northwindtraders.com --gaps         # hardening gap analysis
recon batch domains.txt --json            # batch mode (default 5 concurrent)
recon batch domains.txt --csv             # batch CSV for spreadsheets
recon batch domains.txt --json -c 10      # batch with 10 concurrent
recon doctor                              # connectivity check
recon doctor --fix                        # scaffold custom config templates
recon mcp                                 # start MCP server (stdio)

Input is normalized automatically — URLs, schemes, www. prefixes, paths, and whitespace are all stripped.

What You Get

Signal	Source
Company name, tenant ID, auth type	Microsoft OIDC + GetUserRealm
Google Workspace auth type, modules, corporate identity	Google login flow + CNAME probing + BIMI VMC
Email provider	MX records
Email security score (0–5)	DMARC + DKIM + SPF + MTA-STS + BIMI
187 SaaS services	TXT, SPF, MX, CNAME, NS, CAA, SRV, DKIM selectors
Email gateway / SASE / security stack	DNS fingerprints
Signal intelligence (29 signals)	Metadata-aware YAML rules with cross-reference conditions
Certificate intelligence	crt.sh + CertSpotter fallback: issuance velocity, issuer diversity, cert age
Posture observations	Neutral factual analysis across email, identity, infrastructure
Related domains	CNAME breadcrumbs + certificate transparency (crt.sh / CertSpotter)
Delta / change detection	Compare current vs. previous JSON export
Evidence traceability	Per-detection source records with dual confidence scoring
Security posture assessment	Exposure scoring, hardening gaps, comparative analysis (MCP + CLI)

All from public sources. Zero authentication. Results vary by domain.

MCP Server

recon runs as an MCP server for Claude, Cursor, VS Code, Kiro, ChatGPT, or any MCP client:

{
  "mcpServers": {
    "recon": {
      "command": "recon",
      "args": ["mcp"],
      "autoApprove": ["lookup_tenant", "analyze_posture"]
    }
  }
}

Then ask your AI: "Run a recon lookup on northwindtraders.com and analyze the posture."

Available MCP tools: lookup_tenant, analyze_posture, assess_exposure, find_hardening_gaps, compare_postures, chain_lookup, reload_data.

See docs/mcp.md for setup details, available tools, and config file locations per client.

Documentation

Doc	Contents
Fingerprints	Detection types, custom fingerprints, email security scoring, related domain enrichment
Signals	4-layer signal intelligence, 29 signal rules, metadata conditions, custom signals
MCP Server	AI agent integration setup, tools, config locations
Roadmap	What's planned, what's not, and why
Legal	Disclaimer, accuracy, fictional examples, third-party notice
Contributing	How to add fingerprints, signals, and code
Changelog	Version history

Development

pip install -e ".[dev]"
pytest tests/                          # 723 tests
ruff check recon_tool/                 # lint
pyright recon_tool/                    # type check

License

MIT — see LICENSE for details.

This tool queries only public DNS records and unauthenticated endpoints. See docs/legal.md for full disclaimer.