| name | httpx |
| description | Use ProjectDiscovery httpx for authorized, low-rate HTTP availability checks, response triage, and lightweight technology signals. |
httpx
Use ProjectDiscovery httpx for low-rate HTTP checks of in-scope hosts and URLs. Use it to validate HTTP/HTTPS availability and collect status, title, redirect, TLS, and lightweight technology signals. This is the ProjectDiscovery CLI, not the Python httpx library.
Help First
Before constructing commands, run the installed help and use it as the source of truth:
httpx -h
Usage Rules
- Work only on explicitly authorized targets.
- Prefer a single URL or a small, reviewed file or stdin batch. Do not feed unbounded discovery output directly into
httpx.
- Confirm the input count before execution and split unexpectedly large lists into reviewed batches.
- Prefer JSON output when results will be parsed with
jq or consumed by another tool.
- Use silent/no-color output modes when piping to avoid mixing progress text with data.
- Save large outputs to files rather than streaming them into the conversation.
- Treat detected technologies, titles, redirects, and TLS observations as triage signals; validate important claims with response evidence, browser inspection, or targeted follow-up.
- Keep concurrency and request rates low by default. Do not use update, cloud/dashboard upload, screenshot, headless browser, or high-concurrency modes unless the user explicitly asks and the scope permits it.
Common Workflows
Probe a small, reviewed host list and keep structured evidence:
httpx -l hosts.txt -silent -threads 5 -rate-limit 10 -status-code -title -tech-detect -follow-redirects -json -o httpx.jsonl
Probe a single URL before browser review:
printf '%s\n' 'https://example.com' | httpx -silent -threads 1 -rate-limit 2 -status-code -title -tech-detect
Use jq on JSONL output for counts, filtering, or downstream input:
jq -r 'select(.status_code == 200) | .url' httpx.jsonl
Output
Report the target scope, command used, output path, live hosts, status/title/technology signals, and any validation gaps.
