Download the CFDI XML

Return the stamped CFDI 4.0 XML (with the TimbreFiscalDigital). Only available once stamped — a draft/stamp_failed invoice returns 409 invoice.xml_requires_stamp.

GET /v1/invoices/{id}/xml

Download the CFDI XML

cURL

curl --request GET \
  --url https://api.newinvoice.dev/v1/invoices/{id}/xml \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.newinvoice.dev/v1/invoices/{id}/xml"

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

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

print(response.text)

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

fetch('https://api.newinvoice.dev/v1/invoices/{id}/xml', 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.newinvoice.dev/v1/invoices/{id}/xml",
  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.newinvoice.dev/v1/invoices/{id}/xml"

	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.newinvoice.dev/v1/invoices/{id}/xml")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.newinvoice.dev/v1/invoices/{id}/xml")

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

401

{
  "type": "https://errors.invoiceapi.mx/auth_unauthorized",
  "title": "Authentication required",
  "status": 401,
  "code": "auth.unauthorized",
  "detail": "Missing or invalid API key.",
  "remediation": "Send `Authorization: Bearer sk_test_...` (or sk_live_...) with a valid API key.",
  "doc_url": "/docs/errors#auth-unauthorized",
  "request_id": "req_2P9K3sample"
}

{
  "type": "https://errors.invoiceapi.mx/resource_not_found",
  "title": "Resource not found",
  "status": 404,
  "code": "resource.not_found",
  "detail": "No such id in this org + mode.",
  "remediation": "Verify the id and that the key mode (test/live) matches the id.",
  "doc_url": "/docs/errors#resource-not_found",
  "request_id": "req_2P9K3sample"
}

{
  "type": "https://errors.invoiceapi.mx/cfdi_invalid_input",
  "title": "Invalid invoice",
  "status": 422,
  "code": "cfdi.invalid_input",
  "detail": "items.0.unit_price: expected a decimal string.",
  "remediation": "Fix every field listed in `errors` and resubmit. See /openapi.json for the schema.",
  "doc_url": "/docs/errors#cfdi-invalid_input",
  "request_id": "req_2P9K3sample"
}

{
  "type": "https://errors.invoiceapi.mx/rate_limit_exceeded",
  "title": "Rate limit exceeded",
  "status": 429,
  "code": "rate_limit.exceeded",
  "detail": "Too many requests for this key + request class (reads and writes are limited separately).",
  "remediation": "Back off and retry after the number of seconds in the Retry-After header; batch work or lower your request rate.",
  "doc_url": "/docs/errors#rate_limit-exceeded",
  "request_id": "req_2P9K3sample"
}

{
  "type": "https://errors.invoiceapi.mx/internal_error",
  "title": "Internal server error",
  "status": 500,
  "code": "internal.error",
  "detail": "An unexpected error occurred.",
  "remediation": "Retry later; contact support with the request_id if it persists.",
  "doc_url": "/docs/errors#internal-error",
  "request_id": "req_2P9K3sample"
}

Authorizations

Authorization · string · header · required

API key: Authorization: Bearer sk_test_... or sk_live_....

Headers

Invoice-Version · string

Pin a dated API release (Stripe-style). Omit to use the current version. An unknown value returns 400 request.invalid_version. Echoed back on every response.

Example:

"2026-07-10"

Invoice-Account · string

Connect: act on behalf of one of your connected accounts (its acct_…/org_… id). Omit to act as your own organization. Not honored on /v1/api_keys.

Example:

"org_2P9connectedacct"

Path Parameters

id · string · required

Invoice id, e.g. "inv_2P9K3sample".

Minimum string length: 1

Response

200

Default Response