Check-Host API Node.js Library

A lightweight, lightning-fast, and feature-complete Node.js wrapper for the Check-Host.cc API. Full documentation is available at docs.check-host.cc.

Seamlessly integrate global network diagnostics into your backend. Perform remote Ping, TCP, UDP, DNS, and HTTP checks from multiple worldwide locations—straight from your JavaScript or TypeScript application. Checks from 60+ locations worldwide.

Features

• Zero Dependencies: Built purely on the native Node.js 18+ fetch API. No axios, no node-fetch, zero package bloat.

• Bulletproof Payloads: Strictly utilizes POST requests for all active monitoring endpoints. This completely eliminates nasty URL-encoding issues with complex hostnames or custom UDP payloads.

• Modern & Modular: Native ES Modules (import / export) support. Every endpoint strategy lives in an isolated file, ensuring a clean architecture and easy debugging.

• Smart Authentication: API Key auto-injection. Configure your key once during initialization, and the core SDK seamlessly handles all authentication payloads under the hood.

Requirements

• Node.js: v18.0.0 or higher.
• package.json with "type": "module" or using .mjs extension.

Installation

Ensure you have Node.js 18+ installed. You can install the package directly from npm:

npm i @check-hostcc/check-host-api

Quickstart

import CheckHost from '@check-hostcc/check-host-api';

// Initialize the client. The API Key is optional.
// Without an API key, standard public rate limits apply.
//const checkHost = new CheckHost({ apikey: 'YOUR_API_KEY_HERE' });
// Or leave empty: new CheckHost()
const checkHost = new CheckHost();

Complete API Reference & Examples

This library supports both minimal invocations and detailed, options-rich requests for every endpoint.

Common Options Used in Examples

• region: Array of Nodes or ISO Country Codes (e.g. ['DE', 'NL']) or Continents (e.g. ['EU']).
• repeatchecks: Number of repeated probes to perform per node for higher accuracy (Live Check).
• timeout: Connection timeout threshold in seconds (Currently disabled on Check-host backend, but supported).

Information & Utilities

Get My IP

Returns the requesting client's public IPv4 or IPv6 address.

const ip = await checkHost.myip();

Get Locations

Fetches a dynamic list of all currently active monitoring nodes across the globe.

const nodes = await checkHost.locations();

Host Info (GeoIP/ASN)

Retrieves detailed geolocation data, ISP information, and ASN details.

// Minimal Example
const info = await checkHost.info('check-host.cc');

WHOIS Lookup

Performs a WHOIS registry lookup.

// Minimal Example
const whois = await checkHost.whois('check-host.cc');

Active Monitoring (POST Tasks)

Monitoring endpoints initiate tasks asynchronously and return a Task Object containing a uuid. Use the report() method (documented below) to fetch the actual results.

Ping

Dispatches ICMP echo requests to the target from global nodes.

// Minimal Example
const pingMin = await checkHost.ping('8.8.8.8');

// Max Example (With options)
const pingMax = await checkHost.ping('8.8.8.8', {
    region: ['DE', 'NL'],
    repeatchecks: 5,
    timeout: 5
});

DNS

Queries global nameservers for specific DNS records.

// Minimal Example
const dnsMin = await checkHost.dns('check-host.cc');

// Max Example (With options - TXT Record)
const dnsMax = await checkHost.dns('check-host.cc', {
    querymethod: 'TXT', // A, AAAA, MX, TXT, SRV, etc.
    region: ['US', 'DE']
});

TCP

Attempts to establish a 3-way TCP handshake on a specific destination port.

// Minimal Example (Target, Port)
const tcpMin = await checkHost.tcp('1.1.1.1', 443);

// Max Example (With options)
const tcpMax = await checkHost.tcp('1.1.1.1', 80, {
    region: ['DE', 'NL'],
    repeatchecks: 3,
    timeout: 10
});

UDP

Sends UDP packets to a specified target and port. We have for most used ports the right payload. If you are unsure about the payload, leave it empty and we will use the default payload.

// Minimal Example (Target, Port)
const udpMin = await checkHost.udp('1.1.1.1', 53);

// Max Example (With custom hex payload and options)
const udpMax = await checkHost.udp('1.1.1.1', 123, {
    payload: '0b', // NTP Request Hex
    region: ['EU'],
    repeatchecks: 2,
    timeout: 5
});

HTTP

Executes an HTTP/HTTPS request to the target to measure TTFB and latency.

// Minimal Example
const httpMin = await checkHost.http('https://check-host.cc');

// Max Example (With options)
const httpMax = await checkHost.http('https://check-host.cc', {
    region: ['US', 'DE'],
    repeatchecks: 3,
    timeout: 10
});

MTR

Initiates an MTR (My Traceroute) diagnostic.

// Minimal Example
const mtrMin = await checkHost.mtr('1.1.1.1');

// Max Example (With protocols, IP forced, and options)
const mtrMax = await checkHost.mtr('1.1.1.1', {
    repeatchecks: 15,
    forceIPversion: 4,     // 4 or 6
    forceProtocol: 'TCP',  // default is ICMP
    region: ['DE', 'US']
});

Fetching Results

Report

Fetches the compiled report and real-time statuses from a previously initiated monitoring check (Ping, TCP, HTTP, etc.) using its unique uuid. Wait 1-2 seconds after starting a check before polling. Longer checks with multiple repeats take one check per second and can be requested multiple times.

// The check UUID is returned by any monitoring method above
const taskUuid = 'c0b4b0e3-aed7-4ae2-9f53-7bac879697cb';

// Fetch the result payload
const report = await checkHost.report(taskUuid);

License

ISC License