curl --request GET \
  --url https://app.saasybill.com/api/v1/customers \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://app.saasybill.com/api/v1/customers"

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

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

print(response.text)

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

fetch('https://app.saasybill.com/api/v1/customers', 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://app.saasybill.com/api/v1/customers",
  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://app.saasybill.com/api/v1/customers"

	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://app.saasybill.com/api/v1/customers")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.saasybill.com/api/v1/customers")

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": "3b9f1c1e-6a52-4c0e-9d7e-1f6f2f0b7a11",
      "object": "customer",
      "code": "ACME-001",
      "name": "Acme Pty Ltd",
      "company_name": "Acme Pty Ltd",
      "first_name": null,
      "last_name": null,
      "email": "accounts@acme.example",
      "status": "active",
      "xero_contact_id": "d5f2a8c1-6b73-4e09-8a1d-4c7e9b3f0a12",
      "created": "2026-08-14T02:31:08.000Z"
    }
  ],
  "has_more": false
}

{
  "error": {
    "type": "authentication_error",
    "code": "invalid_api_key",
    "message": "Provide a valid API key as `Authorization: Bearer <key>`.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "permission_error",
    "code": "insufficient_scope",
    "message": "This API key does not have the `subscriptions:write` scope.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "not_found",
    "code": "customer_not_found",
    "message": "There is no customer with that id.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "conflict",
    "code": "idempotency_conflict",
    "message": "This `Idempotency-Key` was used with a different request. Use a new key for a different request.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "invalid_request_error",
    "code": "invalid_parameter",
    "message": "`units`: Invalid input: expected number, received string",
    "param": "units",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "rate_limit_error",
    "code": "rate_limited",
    "message": "Too many requests. Try again in 12 seconds.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}

{
  "error": {
    "type": "api_error",
    "code": "internal_error",
    "message": "Something went wrong on our side. Retry the request; if it keeps failing, quote the request id.",
    "request_id": "req_4f1a9c2e7b8d3a605e1c9f02"
  }
}