httpx
Informationalhttpx by ProjectDiscovery
Definition
httpx is a multi-purpose HTTP tool developed by ProjectDiscovery. It lets you probe hosts en masse to obtain information such as status codes, page titles, technologies, SSL certificates, response size and more. It is essential in the recon phase to filter live hosts from massive subdomain lists and extract information to prioritize targets.
Impact
Fast filtering of live hosts from massive subdomain listsWeb technology detection (servers, frameworks, CMS)Extracting titles, status codes and SSL certificatesPrioritizing targets based on detected technologyIntegration with the recon pipeline (subfinder → httpx → nuclei)
Examples
Recon pipeline with httpx
httpx is the key intermediate step between subdomain enumeration and vulnerability scanning. It filters live hosts and collects metadata that helps prioritize which applications to investigate first.
# Probe a list of subdomains cat subdomains.txt | httpx -status-code -title -tech-detect # Full recon pipeline subfinder -d example.com | httpx -status-code -title -follow-redirects | tee live-hosts.txt # Extract detailed information httpx -l hosts.txt -status-code -content-length -title -tech-detect -web-server -json -o results.json # Filter only hosts with status 200 cat subdomains.txt | httpx -mc 200 # Detect specific technologies cat hosts.txt | httpx -tech-detect | grep -i "wordpress\|laravel\|django"