curl --request POST \
  --url https://api.numeralhq.com/tax/certificates \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-API-Version: <x-api-version>' \
  --data '
{
  "document_url": "https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...",
  "file_name": "resale.pdf",
  "customer": {
    "reference_customer_id": "20506"
  }
}
'

import requests

url = "https://api.numeralhq.com/tax/certificates"

payload = {
    "document_url": "https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...",
    "file_name": "resale.pdf",
    "customer": { "reference_customer_id": "20506" }
}
headers = {
    "X-API-Version": "<x-api-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-API-Version': '<x-api-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    document_url: 'https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...',
    file_name: 'resale.pdf',
    customer: {reference_customer_id: '20506'}
  })
};

fetch('https://api.numeralhq.com/tax/certificates', 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.numeralhq.com/tax/certificates",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'document_url' => 'https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...',
    'file_name' => 'resale.pdf',
    'customer' => [
        'reference_customer_id' => '20506'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "X-API-Version: <x-api-version>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.numeralhq.com/tax/certificates"

	payload := strings.NewReader("{\n  \"document_url\": \"https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...\",\n  \"file_name\": \"resale.pdf\",\n  \"customer\": {\n    \"reference_customer_id\": \"20506\"\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-Version", "<x-api-version>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.numeralhq.com/tax/certificates")
  .header("X-API-Version", "<x-api-version>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"document_url\": \"https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...\",\n  \"file_name\": \"resale.pdf\",\n  \"customer\": {\n    \"reference_customer_id\": \"20506\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.numeralhq.com/tax/certificates")

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

request = Net::HTTP::Post.new(url)
request["X-API-Version"] = '<x-api-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"document_url\": \"https://your-bucket.s3.amazonaws.com/certs/resale.pdf?X-Amz-Signature=...\",\n  \"file_name\": \"resale.pdf\",\n  \"customer\": {\n    \"reference_customer_id\": \"20506\"\n  }\n}"

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

{
  "id": "upl_4471",
  "object": "tax.certificate_upload",
  "status": "processing",
  "customer": {
    "id": "cust_6126acaf-7379-411a-8ada-00005bac0715",
    "reference_customer_id": "20506"
  },
  "certificate_ids": [],
  "error_message": null,
  "created_at": "2026-09-15T17:04:11.000Z",
  "livemode": true
}

{
  "code": 400,
  "type": "MISSING_FIELD",
  "message": "Required field 'address_country' is missing"
}

{
  "code": 404,
  "type": "CUSTOMER_NOT_FOUND",
  "message": "Customer not found"
}

{
  "code": 400,
  "type": "MISSING_FIELD",
  "message": "Required field 'address_country' is missing"
}

{
  "code": 400,
  "type": "MISSING_FIELD",
  "message": "Required field 'address_country' is missing"
}

{
  "code": 400,
  "type": "MISSING_FIELD",
  "message": "Required field 'address_country' is missing"
}