theHarvester is an open-source OSINT tool for gathering emails, subdomains, hosts, employee names, open ports, and banners from public sources. Used during reconnaissance in penetration testing and red team assessments, it queries search engines, PGP key servers, the Shodan API, and other data sources to map an organization's external threat surface.
Scanned 6/8/2026
Install via CLI
Skills Directoryopenskills install agentskillexchange/skills---
name: "theHarvester OSINT Email and Subdomain Intelligence Gatherer"
slug: "theharvester-osint-email-subdomain-intelligence"
description: "theHarvester is an open-source OSINT tool for gathering emails, subdomains, hosts, employee names, open ports, and banners from public sources. Used during reconnaissance in penetration testing and red team assessments, it queries search engines, PGP key servers, the Shodan API, and other data sources to map an organization's external threat surface."
github_stars: 15942
verification: "security_reviewed"
source: "https://github.com/laramies/theHarvester"
category: "Research & Scraping"
framework: "Multi-Framework"
tool_ecosystem:
github_repo: "laramies/theHarvester"
github_stars: 15942
---
# theHarvester OSINT Email and Subdomain Intelligence Gatherer
theHarvester is an open-source OSINT tool for gathering emails, subdomains, hosts, employee names, open ports, and banners from public sources. Used during reconnaissance in penetration testing and red team assessments, it queries search engines, PGP key servers, the Shodan API, and other data sources to map an organization's external threat surface.
## Installation
Use the upstream install or setup path that matches your environment:
- git clone https://github.com/laramies/theHarvester
- uv sync
- uv run theHarvester
- uv sync --all-groups
Requirements and caveats from upstream:
-  
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