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.
Installs into .claude/skills of the current project.
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---
title: "theHarvester OSINT Email and Subdomain Intelligence Gatherer"
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."
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
Choose whichever fits your setup:
1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.
## Source
- [Agent Skill Exchange](https://agentskillexchange.com/skills/theharvester-osint-email-subdomain-intelligence/)
