curl --request GET \
  --url https://v3-api.newscatcherapi.com/api/source-groups \
  --header 'x-api-token: <api-key>'

import requests

url = "https://v3-api.newscatcherapi.com/api/source-groups"

headers = {"x-api-token": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {'x-api-token': '<api-key>'}};

fetch('https://v3-api.newscatcherapi.com/api/source-groups', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://v3-api.newscatcherapi.com/api/source-groups",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "x-api-token: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://v3-api.newscatcherapi.com/api/source-groups"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("x-api-token", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://v3-api.newscatcherapi.com/api/source-groups")
  .header("x-api-token", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://v3-api.newscatcherapi.com/api/source-groups")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["x-api-token"] = '<api-key>'

response = http.request(request)
puts response.read_body

{
  "source_groups": [
    {
      "slug": "top_100_financial_news",
      "name": "Top 100 financial news publishers",
      "description": "The most read finance and markets publishers, English-language."
    }
  ],
  "total": 21,
  "page": 1,
  "page_size": 100
}

{
  "message": "The 'x-api-token' parameter has an invalid value. Please provide a valid API key.",
  "status_code": 401,
  "status": "Unauthorized"
}

{
  "message": "Your plan request date range cannot be greater than 400 days",
  "status_code": 403,
  "status": "Forbidden"
}

{
  "message": "Invalid date format",
  "status_code": 422,
  "status": "Validation error"
}

{
  "message": "Max API requests concurrency reached",
  "status_code": 429,
  "status": "Too many requests"
}

Internal Server Error

{
  "message": "Source groups are temporarily unavailable, so this search was not run. Please retry - this request has not been charged.",
  "status_code": 503,
  "status": "Service unavailable"
}