API guides/IP, DNS, and HTTP
Return the caller’s public IPv4 or IPv6. ipify (JSON) and Cloudflare trace. Both free, no key.
2 providers · 3 min · Limits change — verify before you ship
IP, DNS, and HTTP
Useful in diagnostics and “what IP will this server egress as?” checks. This is not geolocation — chain it with an IP-to-details API if you need city or ASN.
| Provider | Pricing | Key | HTTPS | CORS |
|---|---|---|---|---|
| ipify | Free | No key | Yes | Usually yes |
| Cloudflare trace | Free | No key | Yes | Verify |
GET https://api.ipify.org?format=json
HTTPS
Yes
API key
No key
CORS
Usually yes
Use
Free tier
Limits. No published hard cap. Still cache and avoid polling loops.
Commercial. Documented as free to use. Confirm on ipify.org.
Note. Use api64.ipify.org if you care about IPv6.
curl -sS "https://api.ipify.org?format=json"GET https://www.cloudflare.com/cdn-cgi/trace
HTTPS
Yes
API key
No key
CORS
Verify
Use
Free tier
Limits. Operational endpoint, not a billed API. Do not build a product that scrapes it in a hot path.
Commercial. Fine for occasional diagnostics. Not a geolocation product.
Note. Response is text/plain key=value lines, not JSON. loc is a country hint, not a full geo record.
curl -sS "https://www.cloudflare.com/cdn-cgi/trace"PureDevKit does not host or proxy these APIs. Pricing, rate limits, CORS, authentication, and JSON shapes can change without notice. Always confirm the current rules on the provider’s official documentation before you ship.