Free Proxy IP Validity Verification API | Real-time IP Availability Checking

Hands-on with a free API to verify if a proxy IP is reliable or not

Many people have encountered this situation when using proxy IPs: it's hard to find a list of free proxies, but when you actually use them, you find that most of them can't connect. This time you need a real-time detection tool, and write your own verification script is too much trouble. In fact, using a ready-made API can quickly solve this problem.

Why proxy IPs need to be detected in real time?

Proxy IPs are like fresh food in the supermarket, freshness is important. An IP that works in the morning may not work in the afternoon. Especially for free proxy IPs, the survival time is usually not more than 1 hour. Our real test found that the availability of some public proxy lists is even less than 10%.

Using a failed proxy will result in:

1. Request time-outs affect efficiency
2. Targeted websites to identify anomalous traffic
3. Risk of loss of critical data

Build an automated inspection system in three steps

Here we recommend using the free verification API provided by ipipgo, their residential IP resources cover 240+ countries and regions around the world, and the verification results are more accurate. Specific operation process:

Step 1: Get a list of IPs to be detected

Organize your proxy IP documentation in the recommended format: one IP per line (e.g. 112.113.114.115:8080)

Step 2: Call the Authentication API

import requests

def check_proxy(proxy): api_url =
    api_url = "https://api.ipipgo.com/proxy-check"
    params = {
        
        "port": proxy.split(':')[1]
    }
    response = requests.get(api_url, params=params)
    return response.json()

 Example return result
{
    "status": "active",
    "speed": 356, response speed in milliseconds
    "location": "US", "type": "residential
    "type": "residential"
}

Step 3: Filter available IPs

Filtering based on the returned results with a status ofactiveIP, it is recommended to keep the response speed below 800ms. Note that different business scenarios have different speed requirements, for example:

Professional Tools vs.

While it is possible to write your own scripts for detection, there are three distinct advantages to using a specialized API:

1. Avoid IP blocking by targeted websites (detection requests are disguised as normal traffic)
2. Automatic identification of the type of anonymity (transparent/anonymous/highly anonymous)
3. Real-time updating of the geolocation database

Taking ipipgo as an example, their detection system accesses 90 million+ residential IP databases and can accurately identify server room IPs and home broadband IPs, which is especially important for businesses that need to simulate real user scenarios.

Frequently Asked Questions

Q: Why are free agents always unstable?
A: Most of the free proxies are from public networks, and there are cases of equipment shutdown, network fluctuation, and artificial shutdown. It is recommended to use ipipgo such professional service providers of residential proxy, stability up to 99% or more.

Q: How can I improve the efficiency of testing?
A: Use multi-threaded concurrent detection, but be careful to control the frequency of requests. ipipgo's API supports batch detection and can verify up to 100 IPs in a single pass.

Q: Is the detected IP actually used or failed?
A: It may be caused by protocol mismatch, such as detection with HTTP protocol, the actual business needs HTTPS. ipipgo supports socks5/http/https all-protocol detection, it is recommended to specify the protocol type in the verification.

the right tool saves effort and leads better results

The quality of the proxy IP directly affects the success or failure of the business. Although it is possible to filter out available IPs through API verification, long-term use suggests directly choosing a reliable service provider. Platforms like ipipgo that support all protocols and dynamic and static options not only save the trouble of frequent verification, but also ensure the purity of the IP pool, which is especially suitable for enterprise users who need long-term stable service.