Get Certificate

Retrieve a single certificate by id, including a short-lived download_url. Live-only.

GET /tax/certificates/{certificate_id}

Get Certificate

cURL

curl --request GET \
  --url https://api.numeralhq.com/tax/certificates/{certificate_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'X-API-Version: <x-api-version>'

import requests

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

headers = {
    "X-API-Version": "<x-api-version>",
    "Authorization": "Bearer <token>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'X-API-Version': '<x-api-version>', Authorization: 'Bearer <token>'}
};

fetch('https://api.numeralhq.com/tax/certificates/{certificate_id}', 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/{certificate_id}",
  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-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"
	"net/http"
	"io"
)

func main() {

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

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

	req.Header.Add("X-API-Version", "<x-api-version>")
	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.numeralhq.com/tax/certificates/{certificate_id}")
  .header("X-API-Version", "<x-api-version>")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

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

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

request = Net::HTTP::Get.new(url)
request["X-API-Version"] = '<x-api-version>'
request["Authorization"] = 'Bearer <token>'

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

200

{
  "id": "cert_a8f3d2c1-1b9a-4c5e-8d7e-6f4a3b2c1d0e",
  "object": "tax.exemption_certificate",
  "certificate_type": {
    "id": "12",
    "name": "California Resale Certificate (CDTFA-230)",
    "certificate_identifier": "US-CA-CDTFA-230"
  },
  "customer": {
    "id": "cust_6126acaf-7379-411a-8ada-00005bac0715",
    "reference_customer_id": "20506"
  },
  "jurisdictions": [
    {
      "jurisdiction_id": "US-CA",
      "effective_date": "2023-12-25",
      "expiration_date": "2023-12-25"
    }
  ],
  "effective_date": "2023-12-25",
  "expiration_date": "2023-12-25",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "livemode": true,
  "download_url": "<string>"
}

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

Get Certificate (2026-03-01)

Retrieve a single exemption certificate by id, including a short-lived download_url for the original document.

Remember to include the X-API-Version: 2026-03-01 header. Certificate endpoints are live-only — using a sk_test_* key returns TESTMODE_NOT_SUPPORTED. Certificates outside your account return CERTIFICATE_NOT_FOUND (404).

The download_url field

download_url is a pre-signed URL pointing to the original certificate document. It expires one hour after the response is issued — re-fetch the certificate to mint a fresh URL.

download_url is null (not omitted) when no document is attached to the certificate yet — typical for processing certificates that haven’t finished ingestion. The certificate itself still exists; the response is 200, not 404. Poll the certificate until a download_url appears, or wait for the certificate.processing_completed webhook (coming in a future release).

Treat download_url as confidential. Anyone with the URL can download the certificate document until the URL expires. Do not log, cache past the TTL, or expose the URL on a public page.

Authorizations

Authorization · string · header · required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Headers

X-API-Version · enum<string> · required

Available options: 2026-03-01

Path Parameters

certificate_id · string · required

Response

200

application/json

Certificate detail (includes pre-signed download_url)

A single exemption certificate.

id · string · required

Example:

"cert_a8f3d2c1-1b9a-4c5e-8d7e-6f4a3b2c1d0e"

object · string · required

The type of object: tax.exemption_certificate

Example:

"tax.exemption_certificate"

status · enum<string> · required

Public lifecycle state of an exemption certificate. expiring and expired are distinct from invalid so a renewable lapse is distinguishable from a revoked or rejected certificate.

Available options: processing, needs_info, active, expiring, expired, invalid

certificate_type · object | null · required

The type of an exemption certificate.

Show child attributes

customer · object | null · required

The customer this object is linked to. id is the Numeral cust_* id; reference_customer_id is the value you supplied when the customer was created (may be null).

Show child attributes

jurisdictions · object[] · required

Show child attributes

effective_date · string<date> | null · required

expiration_date · string<date> | null · required

created_at · string<date-time> · required

updated_at · string<date-time> · required

livemode · enum<boolean> · required

Available options: true

download_url · string<uri> | null · required

Pre-signed URL to download the original certificate document. Expires one hour after issuance — refetch the certificate to mint a new URL. null (response still 200) when no document is attached yet. Treat as confidential.