Free Networking & Protocols APIs

Simple public IP address lookup API with universal CORS support

IP geolocation lookup returning ISP, latitude, longitude, and timezone

Accurate IP geolocation, currency, time zone, and ISP network lookup

Enterprise IP address geolocation, ASN mapping, and VPN/proxy detection

High-accuracy IP address geolocation, country, city, and ASN network lookup

IP address WHOIS registry data, netblock allocation, and abuse contacts

Domain name registration records, registrar details, and DNS nameservers

Free and unlimited IP geolocation lookup REST endpoint with CORS support

Detect fraudulent IP proxies, VPN exits, Tor nodes, and botnets

Get your IP Address using this API

API for accessing CityBikes data including network information, station details, and field filtering.

This API provides information about network errors, including detailed messages and suggestions for resolution. It can be used to display error pages when the network is unreachable or when a certain webpage cannot be accessed.

The Free IP API provides fast and reliable geolocation information for IP addresses, including details like country, city, region, and more. It is available for both commercial and non-commercial usage and supports multiple formats such as JSON and XML.

The GeoNet API allows developers to run common network tools from servers located around the world, facilitating the identification of network behavior based on user region. It includes functionalities like GeoPing for latency measurement and GeoDNS for DNS record lookups.

ipapi.is provides a comprehensive API for obtaining detailed information on IP addresses, including geolocation, hosting provider data, and detection of VPNs, proxies, and abusive behavior. The API is designed for both developers and businesses, offering a user-friendly interface with a generous free tier for basic usage.

This API provides geolocation information and currency data based on a user's IP address. It allows developers to retrieve IP details such as country, city, and currency exchange rates through simple HTTP requests.

GetIPIntel.net provides a free API that detects proxy, VPN, and malicious IP addresses to prevent fraud and abuse on online platforms. It uses advanced algorithms to analyze IP behavior and issue a probability score indicating the likelihood of an IP being fraudulent or abusive.

The Netbait API provides an abuse score for any IPv4 address, indicating its maliciousness on a scale from 0 to 1. It allows public access without authentication, returning real-time threat assessments based on continuously updated data.

IPKit is a free public IP lookup API that returns a stable ipkit.v1 JSON record with geolocation, ASN/ISP and privacy signals. It supports IPv4 and IPv6 and reports VPN, proxy, Tor and cloud flags.

This API provides six keyless GET endpoints for tasks like crawler-IP verification, robots.txt linting, AI-access auditing, and user-agent classification. These endpoints require no accounts or API keys, allowing seamless access while ensuring compliance with CORS and caching policies.

This API provides real-time data on the positions of trains operating within the Konkan Railway network. Users can access live tracking information to improve travel planning and schedule management.

Provides access to comprehensive data on the Lisbon Metro system, including historical and current information about stations, lines, schedules, and passenger statistics. The API allows users to access details about the development and expansion of the metro network, its operational history, and key milestones.

The YotaWarp API generates real WireGuard configurations for Cloudflare WARP, including options for bypassing DPI. It allows users to customize their configurations by specifying DNS servers, MTU, and Persistent Keepalive settings.

This API provides programmatic access to the x402 List directory, which includes services, uptime data, and network statistics. It returns data in JSON format without requiring authentication for read operations, allowing users to explore various features and status of registered x402 payment protocol services.

Community IP blacklist to check and report abusive IP addresses

IP/domain/URL reputation

Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage