Cloudflare Trace

About Cloudflare Trace

Cloudflare Trace API provides access to Cloudflare's built-in trace and geolocation endpoints, exposing request metadata such as IP address, timestamp, user agent, country code, IATA colo location, HTTP version, and TLS/SSL version. It documents several existing Cloudflare endpoints (including one.one.one.one/cdn-cgi/trace and speed.cloudflare.com/meta) and the fields each one returns, such as WARP and Gateway usage flags, SNI status, key exchange method, ASN, city, region, postal code, and latitude/longitude.

It is aimed at developers who want to query IP, location, and connection details without deploying their own server, using publicly available Cloudflare infrastructure endpoints. The repository also links to a companion tool for converting the plain-text trace output into JSON, and to Cloudflare's DNS-over-HTTPS API as a related resource.

Key features

• Returns client IP address, timestamp, and user agent via Cloudflare trace endpoints
• Provides country code and IATA colo location identifier
• Reports HTTP version and TLS/SSL version used by the client
• Detects WARP, Cloudflare Gateway, and Remote Browser Isolation usage
• Cloudflare Geolocation API returns city, region, postal code, latitude and longitude

Frequently asked questions