How do I install the Subfinder skill?

Run npx skillmds@latest add sameh1200/subfinder-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Subfinder skill do?

subfinder It is listed under Coding & Dev Tools on SkillMD.

Is Subfinder safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Subfinder?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Subfinder free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Subfinder?

Sameh1200 (@sameh1200) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Subfinder by sameh1200 — Agent Skill

Name: Subfinder
Rating: 4.5 (4 reviews)
Author: Sameh1200

File contents

subfinder

Repo

https://github.com/projectdiscovery/subfinder

Installation

go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest

# Binary
wget https://github.com/projectdiscovery/subfinder/releases/latest/download/subfinder_linux_amd64.zip
unzip subfinder_linux_amd64.zip
sudo mv subfinder /usr/local/bin/

export PATH=$PATH:$(go env GOPATH)/bin

Using

# Single domain
subfinder -d target.com -o subs.txt

# All sources
subfinder -d target.com -all -o subs.txt

# Domain list
subfinder -dL domains.txt -o all_subs.txt

# Silent pipe
subfinder -d target.com -silent | httpx -silent

Real-time usage (typical)

Scope	Duration	Notes
Single domain (default sources)	15 – 60 s	very fast passive
Single domain -all	1 – 4 min	more sources, slower
10 domains	2 – 10 min	parallel internally
Large program (100+ domains)	15 – 45 min	use -dL + rate limits

API keys in provider-config.yaml dramatically increase coverage and can slightly increase time.

Current Step

Passive subdomain enumeration. First recon phase.

Next Step

Resolve with dnsx → probe live hosts with httpx → feed into nuclei or amass for deeper mapping.

Errors Fixes

Empty results → configure API keys in ~/.config/subfinder/provider-config.yaml
Rate limit → lower -rl or restrict sources with -s
go: command not found → install golang-go then re-run go install
Binary not found → add $(go env GOPATH)/bin to PATH

Frequently asked questions

Subfinder