curl --request POST \
  --url https://api.chift.eu/consumers/{consumer_id}/invoicing/upload-document \
  --header 'Content-Type: application/json' \
  --data '
{
  "base64_string": "<base64-encoded-file-content>"
}
'

import requests

url = "https://api.chift.eu/consumers/{consumer_id}/invoicing/upload-document"

payload = { "base64_string": "<base64-encoded-file-content>" }
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({base64_string: '<base64-encoded-file-content>'})
};

fetch('https://api.chift.eu/consumers/{consumer_id}/invoicing/upload-document', 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.chift.eu/consumers/{consumer_id}/invoicing/upload-document",
  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([
    'base64_string' => '<base64-encoded-file-content>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.chift.eu/consumers/{consumer_id}/invoicing/upload-document"

	payload := strings.NewReader("{\n  \"base64_string\": \"<base64-encoded-file-content>\"\n}")

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

	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.chift.eu/consumers/{consumer_id}/invoicing/upload-document")
  .header("Content-Type", "application/json")
  .body("{\n  \"base64_string\": \"<base64-encoded-file-content>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.chift.eu/consumers/{consumer_id}/invoicing/upload-document")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"base64_string\": \"<base64-encoded-file-content>\"\n}"

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

{
  "id": "<this-id>",
  "source_ref": {
    "id": "<target-software-id>",
    "model": "invoice"
  },
  "currency": "EUR",
  "invoice_type": "customer_invoice",
  "status": "cancelled",
  "invoice_date": "2026-01-15",
  "tax_amount": 42,
  "untaxed_amount": 200,
  "total": 242,
  "lines": [],
  "partner_id": "<invoicing-partner-id>",
  "invoice_number": "INV-2026-0001",
  "due_date": "2026-02-14",
  "reference": "REF-0001",
  "payment_communication": "+++000/0000/00000+++",
  "customer_memo": "Thank you for your business.",
  "journal_ref": {
    "id": "<target-software-id>",
    "model": "invoice",
    "name": "Example Company S.A."
  },
  "italian_specificities": {
    "stamp_duty_amount": 2,
    "withholding_tax": {
      "rate": 20,
      "amount": 40,
      "reason": "RT01",
      "payment_reason": "A"
    },
    "welfare_fund": {
      "rate": 4,
      "amount": 8,
      "type": "TC01"
    },
    "payment_reporting": {
      "method": "MP01",
      "conditions": "TP01"
    }
  },
  "spanish_specificities": {
    "withholding_tax": {
      "tax_rate": -19,
      "tax_code": "<accounting-tax-code>",
      "tax_amount": -38
    }
  },
  "last_updated_on": "2026-01-15T10:30:00Z",
  "outstanding_amount": 0,
  "last_payment_date": "2026-02-14",
  "accounting_date": "2026-01-15",
  "payment_method_id": "<invoicing-payment-method-id>",
  "currency_exchange_rate": 1
}

{
  "message": "Error while trying to perform your request",
  "status": "error"
}

{
  "message": "Validation error",
  "status": "error",
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}