twelvesec/gasmask

Health v2 · maintenance only

Adoption not part of the score

1462 stars · 179 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

GasMasK is an all-in-one open source OSINT and reconnaissance tool written in Python 3. It aggregates information about a target domain from many sources including search engines, DNS, whois, certificate transparency, Shodan, and Censys.

Use cases

• gather osint on a domain
• enumerate subdomains and dns records
• find emails and employees via linkedin and google
• whois lookup for a domain
• query shodan and censys for exposed hosts
• reconnaissance before a pentest
• search certificate transparency logs for subdomains

When to choose

• you want a single CLI that queries many OSINT sources for a domain
• you need quick passive reconnaissance during a security assessment
• you want results exported in multiple output formats

When to avoid

• you need active scanning or exploitation rather than passive information gathering
• you need a maintained tool - the latest release dates to 2021 and some sources like Spyse or Google+ may be defunct
• you need a GUI or web interface

Facets

cli-tool · maturity maintenance

osint web-scraping search-engine security security osint penetration-testing python cli reconnaissance information-gathering whois dns-enum shodan censys command-line linux

Member repositories

For agents

markdown · JSON · MCP: product_card(name="twelvesec/gasmask")