curl --request POST \
  --url https://api.emissa.com.ar/v1/customers/validate-tax \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "taxpayerId": "cmfa1b2c30000",
  "documentType": "CUIT",
  "documentNumber": "30500010912",
  "vatCondition": "IVA_RESPONSABLE_INSCRIPTO",
  "name": "Cliente SA"
}
'

import requests

url = "https://api.emissa.com.ar/v1/customers/validate-tax"

payload = {
    "taxpayerId": "cmfa1b2c30000",
    "documentType": "CUIT",
    "documentNumber": "30500010912",
    "vatCondition": "IVA_RESPONSABLE_INSCRIPTO",
    "name": "Cliente SA"
}
headers = {
    "X-API-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    taxpayerId: 'cmfa1b2c30000',
    documentType: 'CUIT',
    documentNumber: '30500010912',
    vatCondition: 'IVA_RESPONSABLE_INSCRIPTO',
    name: 'Cliente SA'
  })
};

fetch('https://api.emissa.com.ar/v1/customers/validate-tax', 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.emissa.com.ar/v1/customers/validate-tax",
  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([
    'taxpayerId' => 'cmfa1b2c30000',
    'documentType' => 'CUIT',
    'documentNumber' => '30500010912',
    'vatCondition' => 'IVA_RESPONSABLE_INSCRIPTO',
    'name' => 'Cliente SA'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-API-Key: <api-key>"
  ],
]);

$response = curl_exec($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.emissa.com.ar/v1/customers/validate-tax"

	payload := strings.NewReader("{\n  \"taxpayerId\": \"cmfa1b2c30000\",\n  \"documentType\": \"CUIT\",\n  \"documentNumber\": \"30500010912\",\n  \"vatCondition\": \"IVA_RESPONSABLE_INSCRIPTO\",\n  \"name\": \"Cliente SA\"\n}")

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

	req.Header.Add("X-API-Key", "<api-key>")
	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.emissa.com.ar/v1/customers/validate-tax")
  .header("X-API-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"taxpayerId\": \"cmfa1b2c30000\",\n  \"documentType\": \"CUIT\",\n  \"documentNumber\": \"30500010912\",\n  \"vatCondition\": \"IVA_RESPONSABLE_INSCRIPTO\",\n  \"name\": \"Cliente SA\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.emissa.com.ar/v1/customers/validate-tax")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"taxpayerId\": \"cmfa1b2c30000\",\n  \"documentType\": \"CUIT\",\n  \"documentNumber\": \"30500010912\",\n  \"vatCondition\": \"IVA_RESPONSABLE_INSCRIPTO\",\n  \"name\": \"Cliente SA\"\n}"

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

{
  "id": "cms5182zy00hkurgsa6512cha",
  "documentType": 80,
  "documentNumber": "30500010912",
  "name": "Cliente SA",
  "vatCondition": "IVA Responsable Inscripto",
  "padronStatus": "OK",
  "padronMessage": "<string>",
  "padron": {
    "razonSocial": "CLIENTE SA",
    "estadoClave": "ACTIVO",
    "condicionIva": "IVA Responsable Inscripto",
    "condicionIvaMotivo": "<string>",
    "domicilio": "Av. Rivadavia 500, CABA",
    "desdeCache": false
  }
}

{
  "statusCode": 401,
  "errorCode": "UNAUTHORIZED",
  "message": "No autorizado",
  "timestamp": "2026-07-26T18:30:00.000Z",
  "path": "/v1/invoices/authorize",
  "details": "<string>",
  "retryable": false,
  "retryAfterSeconds": 43200,
  "requestId": "0f2c1a5e-1d9b-4c7a-9a55-7f1a2b3c4d5e"
}

{
  "statusCode": 401,
  "errorCode": "UNAUTHORIZED",
  "message": "No autorizado",
  "timestamp": "2026-07-26T18:30:00.000Z",
  "path": "/v1/invoices/authorize",
  "details": "<string>",
  "retryable": false,
  "retryAfterSeconds": 43200,
  "requestId": "0f2c1a5e-1d9b-4c7a-9a55-7f1a2b3c4d5e"
}

{
  "statusCode": 401,
  "errorCode": "UNAUTHORIZED",
  "message": "No autorizado",
  "timestamp": "2026-07-26T18:30:00.000Z",
  "path": "/v1/invoices/authorize",
  "details": "<string>",
  "retryable": false,
  "retryAfterSeconds": 43200,
  "requestId": "0f2c1a5e-1d9b-4c7a-9a55-7f1a2b3c4d5e"
}

{
  "statusCode": 401,
  "errorCode": "UNAUTHORIZED",
  "message": "No autorizado",
  "timestamp": "2026-07-26T18:30:00.000Z",
  "path": "/v1/invoices/authorize",
  "details": "<string>",
  "retryable": false,
  "retryAfterSeconds": 43200,
  "requestId": "0f2c1a5e-1d9b-4c7a-9a55-7f1a2b3c4d5e"
}

{
  "statusCode": 401,
  "errorCode": "UNAUTHORIZED",
  "message": "No autorizado",
  "timestamp": "2026-07-26T18:30:00.000Z",
  "path": "/v1/invoices/authorize",
  "details": "<string>",
  "retryable": false,
  "retryAfterSeconds": 43200,
  "requestId": "0f2c1a5e-1d9b-4c7a-9a55-7f1a2b3c4d5e"
}