M
API Matrix

ip-fast.com API

⭐ Beginner's Pick Development / No Auth Required Beginner HTTPS CORS
Free to Use Varies (check documentation)
82 Score
Grade A
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Overview

ip-fast.com is a lightweight, no-auth API that returns the caller's IP address along with associated country and city information. It is perfect for quickly detecting where a user is connecting from without any setup or API key. Simply make a GET request and receive instant geolocation data.

💡

Beginner Tip

You can call this API directly from a browser or curl with no setup at all. Use the ?format=json query parameter to receive a structured JSON response instead of plain text.

Available Data

country name and code
population
capital city
region and subregion
flag image URL
IP address information

Example Response

JSON Response 
{
  "name": "Japan",
  "capital": "Tokyo",
  "population": 125800000,
  "region": "Asia",
  "languages": [
    "Japanese"
  ],
  "flag": "https://flagcdn.com/jp.svg",
  "currencies": [
    {
      "code": "JPY",
      "name": "Japanese yen"
    }
  ]
}

Field Reference

ip The public IP address of the requester
country Country name associated with the IP address
city City name associated with the IP address

Implementation Example 

// ⚠️ Note: This URL may be a documentation page. Check official docs for actual API endpoint.
const url = "https://ip-fast.com/docs/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

Plain text response instead of JSON The default response is plain text; JSON format is not requested
✓ Add ?format=json to your request URL to get a structured JSON response
Incorrect city or country returned IP geolocation databases have limited accuracy, especially for mobile or VPN IPs
✓ This is a known limitation of IP geolocation; treat city-level data as approximate and country-level as more reliable
CORS error in browser Browser security policy blocking the cross-origin request
✓ Check if the API supports CORS headers; if needed, make the call server-side or use a CORS proxy

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 20/20
✓ Reliability 7/15
Response Time 510ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS YES
Category Development
Difficulty Beginner
Verified: 2026-04-04

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