ip.app

About ip.app

ip.app is a free API for retrieving the public IP address of the requesting client along with related network and request information. It exposes multiple endpoints covering the IP address itself, ASN, HTTP headers, location, timezone, user-agent, a security/bot-detection endpoint, and a "whereami" endpoint that returns geolocation coordinates compatible with the Mozilla Location Service API. Responses are available in plain text or JSON, and the IP address and IP version are also returned via the HTTP headers x-ipapp-ip and x-ipapp-ip-version regardless of endpoint or format used.

The API supports GET, POST, and HEAD requests, with POST data being ignored, and HEAD requests returning only headers without a response body. Client-sent HTTP headers are echoed back prefixed with x-ipapp-, and the ASN endpoint returns the AS number paired with the organization name. An OpenAPI specification, an MCP server, and a Python package are provided.

It is intended for developers who need to programmatically check a public IP address or inspect request metadata such as ASN, location, timezone, or headers, whether from the command line, scripts, or applications. The page states the service has no ads, trackers, or unusual requirements, and documents rate limiting and geographic restrictions as part of its usage terms.

Key features

• Returns the requesting client's public IP address (IPv4 or IPv6)
• Provides ASN, location, timezone, and user-agent lookups via dedicated endpoints
• Includes a security endpoint with bot detection
• Supports plain text, JSON, and HTTP header response formats
• Works with GET, POST, and HEAD methods
• Ships an OpenAPI specification, MCP server, and Python package

Frequently asked questions