curl --request GET \
  --url https://api.gemrate.com/v1/cards/population/changes \
  --header 'x-api-key: <api-key>'

import requests

url = "https://api.gemrate.com/v1/cards/population/changes"

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

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

print(response.text)

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

fetch('https://api.gemrate.com/v1/cards/population/changes', 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://api.gemrate.com/v1/cards/population/changes",
  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-key: <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://api.gemrate.com/v1/cards/population/changes"

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

	req.Header.Add("x-api-key", "<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://api.gemrate.com/v1/cards/population/changes")
  .header("x-api-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.gemrate.com/v1/cards/population/changes")

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

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

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

{
  "data": {
    "gemrate_ids": [
      "25b4432f12a5d6ec29a6f00490200416d5dfa242",
      "3a1f9c0b7e2d4856af13c6900128b4e7d9c0a1f2"
    ],
    "count": 2,
    "since": "2026-06-01",
    "has_more": true,
    "next_cursor": "MjAyNi0wNi0wMXwzYTFmOWMwYjdlMmQ0ODU2YWYxM2M2OTAwMTI4YjRlN2Q5YzBhMWYy"
  },
  "meta": {
    "request_id": "req_abc123"
  }
}

{
  "error": {
    "code": "invalid_grader",
    "message": "Unknown grader 'foo'."
  },
  "meta": {
    "request_id": "req_abc123"
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing or invalid API key."
  },
  "meta": {
    "request_id": "req_abc123"
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "Your key does not have access to this resource."
  },
  "meta": {
    "request_id": "req_abc123"
  }
}

{
  "error": {
    "code": "rate_limited",
    "message": "Too many requests."
  },
  "meta": {
    "request_id": "req_abc123"
  }
}

{
  "error": {
    "code": "internal_error",
    "message": "Something went wrong."
  },
  "meta": {
    "request_id": "req_abc123"
  }
}