curl --request GET \
  --url https://api.arbiterapi.com/v1/polymarket/markets \
  --header 'X-API-Key: <api-key>'

import requests

url = "https://api.arbiterapi.com/v1/polymarket/markets"

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.arbiterapi.com/v1/polymarket/markets', 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.arbiterapi.com/v1/polymarket/markets",
  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.arbiterapi.com/v1/polymarket/markets"

	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.arbiterapi.com/v1/polymarket/markets")
  .header("X-API-Key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.arbiterapi.com/v1/polymarket/markets")

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": [
    {
      "id": "531202",
      "question": "Will Bitcoin hit $100k by June 2026?",
      "conditionId": "0xb48621f7eba07b0a3eeabc6afb09ae42490239903997b9d412b0f69aeb040c8b",
      "slug": "will-bitcoin-hit-100k-by-june-2026",
      "outcomes": "[\"Yes\", \"No\"]",
      "outcomePrices": "[\"0.65\", \"0.35\"]",
      "volume": "1523400.52",
      "liquidity": "45320.66",
      "active": true,
      "closed": false,
      "startDate": "2025-03-26T16:49:31.084Z",
      "endDate": "2026-06-30T12:00:00Z",
      "createdAt": "2025-03-26T14:44:34.145447Z",
      "updatedAt": "2026-03-29T05:25:34.978655Z",
      "new": false,
      "featured": false,
      "archived": false,
      "clobTokenIds": "[\"12345678901234567890\", \"98765432109876543210\"]",
      "tokens": [
        {
          "token_id": "12345678901234567890",
          "outcome": "Yes",
          "price": 0.65
        },
        {
          "token_id": "98765432109876543210",
          "outcome": "No",
          "price": 0.35
        }
      ],
      "neg_risk": false
    }
  ],
  "cursor": "abc123",
  "has_more": true
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}