curl --request GET \
  --url https://api.finseed.es/v1/number_series \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.finseed.es/v1/number_series"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.finseed.es/v1/number_series', 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.finseed.es/v1/number_series",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

$response = curl_exec($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.finseed.es/v1/number_series"

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

	req.Header.Add("Authorization", "Bearer <token>")

	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.finseed.es/v1/number_series")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.finseed.es/v1/number_series")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "data": [
    {
      "id": "ns_clx123abc456",
      "prefix": "F",
      "type": "standard",
      "first_value": 1,
      "next_value": 42,
      "number_digits": 5,
      "is_default": false,
      "created_at": "2026-06-01T09:30:00Z"
    }
  ],
  "has_more": false,
  "next_cursor": "ns_clx123abc456",
  "next_url": "/v1/number_series?limit=25&starting_after=ns_clx123abc456"
}

{
  "code": "invalid_request",
  "detail": "The request is not valid. A parameter is missing, malformed, or out of range. See the `errors` array for the fields that failed.",
  "errors": [],
  "doc_url": "https://www.finseed.es/docs/api-reference/errors#invalid_request"
}

{
  "code": "unauthorized",
  "detail": "Authentication failed. Send your API key as a bearer token in the `Authorization` header. Keys are scoped to one environment, so a test key cannot read live data and vice versa.",
  "errors": [],
  "doc_url": "https://www.finseed.es/docs/api-reference/errors#unauthorized"
}

{
  "code": "internal_error",
  "detail": "Something went wrong on our side. The request did not complete and can be retried safely.",
  "errors": [],
  "doc_url": "https://www.finseed.es/docs/api-reference/errors#internal_error"
}