A Free IP API With No Signup and No API Key
The Short Answer
HackMyIP is a free IP geolocation and privacy API that needs no signup and no API key. Every endpoint is a plain HTTPS GET, returns JSON, and supports CORS, so you can call it from a script, a serverless function, or directly from browser JavaScript. The base URL is https://hackmyip.com. Start with curl https://hackmyip.com/api/ip to get your own IP with full enrichment. Read the full API docs for every endpoint.
Why No Key Matters
Most IP APIs make you register, confirm an email, and paste a key into every request before you can make a single call. For a quick script, a prototype, or a privacy check, that friction is the whole cost. HackMyIP skips it: paste the URL and run. There is no token to rotate, no dashboard to log into, and no per-key quota to track for basic use.
The Endpoints
All free, all keyless, all JSON:
# Your IP + geolocation + ISP + ASN + VPN/proxy/datacenter classificationThere are more — DNS records, WHOIS/RDAP, reverse DNS, blacklist checks, email breach lookups, port scans, and site up/down checks — all documented on the API docs page and listed for machines in /llms.txt and the OpenAPI spec.
The Even-Simpler Path
If all you want is your own IP in a terminal, you do not even need the /api prefix. curl hackmyip.com prints it as clean text, and curl hackmyip.com/json returns minimal JSON. See the command-line IP guide for one-liners across curl, wget, PowerShell, and Python.
Honest Limits
This is a young, free project — first launched in spring 2026 — run as a privacy toolkit, not an enterprise SLA. There is light rate limiting to keep it healthy for everyone, and the data comes from upstream public providers, so treat it as best-effort rather than a billing-grade source of truth. For a developer-facing breakdown of VPN/proxy detection specifically, see the VPN detection API page, and for batch jobs see bulk IP lookup.
Frequently Asked Questions
Is there a free IP API with no signup?
Yes. HackMyIP offers IP geolocation, ISP/ASN detection, VPN/proxy classification, DNS, WHOIS, breach, and more as free HTTPS GET endpoints with no signup and no API key. Start with curl https://hackmyip.com/api/ip.
Do I need an API key for HackMyIP?
No. None of the public endpoints require a key or a token. You call the URL directly. There is light rate limiting for fair use, but no registration step for basic access.
Can I call the API from browser JavaScript?
Yes. The endpoints send CORS headers, so you can fetch them directly from front-end JavaScript without a proxy. They also work from servers, serverless functions, and scripts.
What can the API tell me about an IP?
For your own IP or any IP you pass, it returns geolocation (city, region, country), ISP and ASN, and a VPN/proxy/datacenter classification with a privacy grade. It can also check an IP against spam blacklists and do reverse DNS.
Is it really free, with no hidden cost?
Yes, the public API is free with no credit card and no paid tier required for the documented endpoints. It is a free privacy toolkit. Please use it reasonably so it stays available for everyone.