- WorldIP.io now offers a keyless IP API requiring no API key, account, or SDK.
- Look up any IPv4 address by sending a GET request to worldip.io/{ip}, returning a clean JSON profile.
- The response includes IP, reverse-DNS, ASN, organization, country, geolocation, CIDR, and rate limit info.
- Calling the API without an address returns the requesting IP's full context.
- Rate limit is 1,000 lookups per day per IP, with rate info in the response headers and body.
- The API is a drop-in replacement for many existing IP lookup services.
- Core keyless lookup including geolocation is free forever; advanced features require an authenticated API.