# IPWTF

> Free web tools and a public API for IP address and network diagnostics: what's my IP, IP geolocation, proxy/VPN detection, DNS leak test, WebRTC leak test, DNSBL blacklist checker, WHOIS lookup, and open-port scanning. No sign-up, no API key.

IPWTF returns the real client IP (IPv4 and IPv6) even behind Cloudflare, plus geolocation and anonymity signals from IP2Location data. Human pages render at ipwtf.com; agents should prefer the API endpoints below, which return structured JSON/XML/CSV via the `format` query parameter (`format=json` default, `format=xml`, `format=csv`).

## Tools

- [What's my IP (home)](https://ipwtf.com/): Client IPv4/IPv6, geolocation, ASN, anonymity/proxy score.
- [WHOIS lookup](https://ipwtf.com/whois): Domain and IP WHOIS records.
- [Proxy checker](https://ipwtf.com/proxy-checker): Detect proxy/VPN/TOR/datacenter IPs.
- [Free proxy list](https://ipwtf.com/free-proxy): Public proxy list with reputation.
- [DNS leak test](https://ipwtf.com/dns-leak-test): Resolvers a client actually hits.
- [WebRTC leak test](https://ipwtf.com/webrtc-leak-test): Local/public IP exposure via WebRTC.
- [DNSBL blacklist checker](https://ipwtf.com/blacklist_checker): Check an IP against DNS blacklists.

## API

- [Client IP info](https://ipwtf.com/api/who): GET `/api/who[/{ip}]` — IP, geo, ASN, proxy flags. JSON/XML/CSV via `?format=`.
- [WHOIS API](https://ipwtf.com/api/whois): GET `/api/whois[/{ip}]` — WHOIS record for an IP or domain.
- [Plain IP info](https://ipwtf.com/ipinfo): GET `/ipinfo` — lightweight IP/geo payload.
- [Developer docs](https://ipwtf.com/developers): Endpoint reference and examples.

## Notes

- All endpoints are read-only, unauthenticated, and safe to call from automated agents.
- Omit `{ip}` to look up the caller's own address.
- Rate limits are lenient; cache responses where possible.