Technology Lookup Examples · Example 3 of 6

A React Site

GEThttps://api.deepinfo.com/v1/lookup/technology

The technologies on react.dev: React, Next.js, Node.js and webpack on Vercel, next to four doubtful matches.

Param: url
Value: https://react.dev

Asks for the technologies on https://react.dev.

Eleven technologies. Seven describe a modern JavaScript site: React (JavaScript frameworks), Next.js (in two categories, Web frameworks and Web servers), Node.js, webpack and Vercel as the web server, plus Google Tag Manager and Google Analytics. The other four, RequireJS, Prototype, Google AdSense and Choices, are reported with confidence 100, but they are unlikely on a Next.js site and none of them appears in the page's HTML: check such detections before relying on them.

Request

curl

curl 'https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Accept: application/json'

Python

import requests

url = "https://api.deepinfo.com/v1/lookup/technology"

params = {
    "url": "https://react.dev"
}

headers = {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
}

response = requests.get(url, params=params, headers=headers)
response.raise_for_status()
print(response.json())

JavaScript

const url = "https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev";

const response = await fetch(url, {
  method: "GET",
  headers: {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
  },
});

const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
)

func main() {
	req, err := http.NewRequest("GET", "https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev", nil)
	if err != nil {
		panic(err)
	}
	req.Header.Set("apikey", "YOUR_API_KEY")
	req.Header.Set("Accept", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(body))
}

Java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev"))
            .header("apikey", "YOUR_API_KEY")
            .header("Accept", "application/json")
            .GET()
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}

using System;
using System.Net.Http;

using var client = new HttpClient();

var request = new HttpRequestMessage(HttpMethod.Get, "https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev");
request.Headers.Add("apikey", "YOUR_API_KEY");
request.Headers.Add("Accept", "application/json");

using var response = await client.SendAsync(request);
Console.WriteLine(await response.Content.ReadAsStringAsync());

PHP

<?php

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => 'https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'apikey: YOUR_API_KEY',
        'Accept: application/json',
    ],
]);

$response = curl_exec($curl);

if ($response === false) {
    throw new RuntimeException(curl_error($curl));
}

echo $response . PHP_EOL;

Ruby

require 'net/http'
require 'uri'

uri = URI('https://api.deepinfo.com/v1/lookup/technology?url=https%3A%2F%2Freact.dev')

request = Net::HTTP::Get.new(uri)
request['apikey'] = 'YOUR_API_KEY'
request['Accept'] = 'application/json'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: uri.scheme == 'https') do |http|
  http.request(request)
end

puts response.body

Response

200 OK · application/json

Response Body

{
  "check_date": "2026-09-24T07:58:29.227Z",
  "connection_status": "success",
  "urls": {
    "https://react.dev/": {
      "status": 200
    }
  },
  "technologies": [
    {
      "slug": "node-js",
      "name": "Node.js",
      "confidence": 100,
      "icon": "node.js.png",
      "website": "http://nodejs.org",
      "cpe": "cpe:/a:nodejs:node.js",
      "version": "",
      "categories": [
        "Programming languages"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser."
    },
    {
      "slug": "react",
      "name": "React",
      "confidence": 100,
      "icon": "React.png",
      "website": "https://reactjs.org",
      "cpe": "cpe:/a:facebook:react",
      "version": "",
      "categories": [
        "JavaScript frameworks"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "React is an open-source JavaScript library for building user interfaces or UI components."
    },
    {
      "slug": "requirejs",
      "name": "RequireJS",
      "confidence": 100,
      "icon": "RequireJS.png",
      "website": "http://requirejs.org",
      "cpe": "cpe:/a:deepvendor:requirejs",
      "version": "",
      "categories": [
        "JavaScript frameworks"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "RequireJS is a JavaScript library and file loader which manages the dependencies between JavaScript files and in modular programming."
    },
    {
      "slug": "prototype",
      "name": "Prototype",
      "confidence": 100,
      "icon": "Prototype.png",
      "website": "http://www.prototypejs.org",
      "cpe": "cpe:/a:deepvendor:prototype",
      "version": "",
      "categories": [
        "JavaScript frameworks"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Prototype is a JavaScript Framework that aims to ease development of web applications."
    },
    {
      "slug": "vercel",
      "name": "Vercel",
      "confidence": 100,
      "icon": "vercel.svg",
      "website": "https://vercel.com",
      "cpe": "cpe:/a:deepvendor:vercel",
      "version": "",
      "categories": [
        "Web servers"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": ""
    },
    {
      "slug": "next-js",
      "name": "Next.js",
      "confidence": 100,
      "icon": "vercel.svg",
      "website": "https://nextjs.org",
      "cpe": "cpe:/a:zeit:next.js",
      "version": "",
      "categories": [
        "Web frameworks",
        "Web servers"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Next.js is a React framework for developing single page Javascript applications."
    },
    {
      "slug": "webpack",
      "name": "webpack",
      "confidence": 100,
      "icon": "webpack.svg",
      "website": "https://webpack.js.org/",
      "cpe": "cpe:/a:deepvendor:webpack",
      "version": "",
      "categories": [
        "Miscellaneous"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Webpack is an open-source JavaScript module bundler."
    },
    {
      "slug": "google-adsense",
      "name": "Google AdSense",
      "confidence": 100,
      "icon": "Google AdSense.svg",
      "website": "https://www.google.fr/adsense/start/",
      "cpe": "cpe:/a:deepvendor:google_adsense",
      "version": "",
      "categories": [
        "Advertising"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience."
    },
    {
      "slug": "choices",
      "name": "Choices",
      "confidence": 100,
      "icon": "Choices.png",
      "website": "https://joshuajohnson.co.uk/Choices/",
      "cpe": "cpe:/a:deepvendor:choices",
      "version": "",
      "categories": [
        "Miscellaneous"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Choices.js is a lightweight, configurable select box/text input plugin."
    },
    {
      "slug": "google-tag-manager",
      "name": "Google Tag Manager",
      "confidence": 100,
      "icon": "Google Tag Manager.svg",
      "website": "http://www.google.com/tagmanager",
      "cpe": "cpe:/a:deepvendor:google_tag_manager",
      "version": "",
      "categories": [
        "Tag managers"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app."
    },
    {
      "slug": "google-analytics",
      "name": "Google Analytics",
      "confidence": 100,
      "icon": "Google Analytics.svg",
      "website": "http://google.com/analytics",
      "cpe": "cpe:/a:deepvendor:google_analytics",
      "version": "",
      "categories": [
        "Analytics"
      ],
      "alternative_cpe_names": [],
      "clean_version": null,
      "description": "Google Analytics is a free web analytics service that tracks and reports website traffic."
    }
  ],
  "version": 1
}

Content-Type: application/json; charset=utf-8
ratelimit-limit: 1
ratelimit-remaining: 0
ratelimit-reset: 1
x-ratelimit-limit-second: 1
x-ratelimit-remaining-second: 0
deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a

Request

What this example sends. Every parameter is documented on Technology; the exact request is in the code panel.

Parameter	Value
`url`query	`https://react.dev`

Reference updated September 24, 2026

Request

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