curl --request GET \
  --url https://api.sandbox.tesouro.com/finops/v1/receivables/required-fields \
  --header 'Authorization: Bearer <token>' \
  --header 'x-finops-version: <x-finops-version>' \
  --header 'x-organization-id: <x-organization-id>'

import requests

url = "https://api.sandbox.tesouro.com/finops/v1/receivables/required-fields"

headers = {
    "x-finops-version": "<x-finops-version>",
    "x-organization-id": "<x-organization-id>",
    "Authorization": "Bearer <token>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {
    'x-finops-version': '<x-finops-version>',
    'x-organization-id': '<x-organization-id>',
    Authorization: 'Bearer <token>'
  }
};

fetch('https://api.sandbox.tesouro.com/finops/v1/receivables/required-fields', 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.sandbox.tesouro.com/finops/v1/receivables/required-fields",
  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>",
    "x-finops-version: <x-finops-version>",
    "x-organization-id: <x-organization-id>"
  ],
]);

$response = curl_exec($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.sandbox.tesouro.com/finops/v1/receivables/required-fields"

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

	req.Header.Add("x-finops-version", "<x-finops-version>")
	req.Header.Add("x-organization-id", "<x-organization-id>")
	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.sandbox.tesouro.com/finops/v1/receivables/required-fields")
  .header("x-finops-version", "<x-finops-version>")
  .header("x-organization-id", "<x-organization-id>")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.tesouro.com/finops/v1/receivables/required-fields")

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

request = Net::HTTP::Get.new(url)
request["x-finops-version"] = '<x-finops-version>'
request["x-organization-id"] = '<x-organization-id>'
request["Authorization"] = 'Bearer <token>'

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

{
  "counterpart": {
    "tax_id": {
      "description": "The counterpart's taxpayer identification number or tax ID. For identification purposes, this field may be required for counterparts that are not VAT-registered.",
      "required": false
    },
    "vat_id": {
      "description": "The counterpart's VAT (Value Added Tax) identification number. This field is required for counterparts that are VAT-registered.",
      "required": false
    }
  },
  "entity": {
    "tax_id": {
      "description": "The entity's taxpayer identification number or tax ID. This field is required for entities that are non-VAT registered.",
      "required": false
    },
    "vat_id": {
      "description": "The entity's VAT (Value Added Tax) identification number. This field is required for entities that are VAT-registered.",
      "required": false
    }
  },
  "line_item": {
    "measure_unit": {
      "description": "Unit used to measure the quantity of the product (e.g. items, meters, kilograms)",
      "required": false
    },
    "tax_rate_value": {
      "description": "Percent minor units. Example: 12.5% is 1250. This field is only required on invoices issued by entities in the US, Pakistan, and other unsupported countries.",
      "required": false
    },
    "vat_rate_id": {
      "description": "Unique identifier of the vat rate object. This field is required for all entities in supported countries except the US and Pakistan.",
      "required": false
    }
  }
}

{
  "error": {
    "message": "<string>"
  }
}

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

{
  "error": {
    "message": "<string>"
  }
}