Network

Port Scan

0calls

1 credits / call

Want to check if a certain port on your server (such as SSH's port 22 or Web's port 80) is open to the outside world? This tool can help you quickly confirm.

Overview

You can specify a host and port number, our server will try to connect to that port and tell you whether it is open, closed or timed out. This is useful for network service configuration checks and basic security scanning.

Query parameters

host

stringrequired

The target host to scan, which can be a domain name or IP address.

port

integerrequired

The port number to scan, ranging from 1 to 65535.

protocol

stringoptional

The protocol used for scanning, can be 'tcp' or 'udp'.

Name	Type	Attributes	Description
`host`	string	required	The target host to scan, which can be a domain name or IP address.
`port`	integer	required	The port number to scan, ranging from 1 to 65535.
`protocol`	string	optional	The protocol used for scanning, can be 'tcp' or 'udp'.

Response

200 / OK

Scan completed! Returns the status of the port.

JSON

400 / Bad Request

Invalid request parameters. Please check if host, port and other parameters are provided and formatted correctly.

JSON

500 / Internal Server Error

Scan failed. An internal error occurred while the server was performing the scan.

JSON

Quick start

Pick your language to see usage examples

Auth mode:

cURL command

curl 'https://uapis.cn/api/v1/network/portscan?host=cn.bing.com&port=80'

Frequently asked questions

Are there any special restrictions for the Port Scan API?

Port Scan follows our standard usage policy. Refer to the endpoint reference above for the exact rate limits and parameter requirements. Reach out if you have unusual needs.

Are the APIs on UAPI free to use?

UAPI gives every visitor free credits so you can call any endpoint right away. Visitor credits have a usage cap, and if you need more you can for additional credits.

Do I need to register an account to use UAPI?

No registration is required for visitor credit calls. If you need more credits or want to manage your call history, you can register a free account. Signed-in users get more free credits and can review usage details in the console.

Which languages and use cases does UAPI support?

Our APIs follow standard HTTP and RESTful design, so any language that can send network requests works — including JavaScript (Node.js, Vue, React), Python, Java, PHP, Go, C#, and more. They fit web apps, mobile backends, mini-program cloud functions, automation scripts, and similar scenarios.

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