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# Previsualizar el prorrateo de cambios

POST https://app.recurrente.com/api/subscriptions/{id}/proration_preview
Content-Type: application/json

Calcula el prorrateo neto de un conjunto de cambios de productos **sin aplicarlos** (equivalente al preview de facturas de Stripe). Envía los mismos `items` y `mode` que enviarías a `PUT /subscriptions/{id}`. Útil para mostrar el monto antes de cobrar con `mode: now_and_charge`.

`chargeable` indica si el neto puede cobrarse de inmediato (positivo y mayor al mínimo de la moneda). Si es `false`, usa `mode: now` (se reflejará en el próximo cobro).

Reference: https://docs.recurrente.com/referencia-api/api-reference/subscriptions/preview-subscription-proration

## Authentication

- `X-SECRET-KEY` header (required) — Tu clave secreta de API. Una llave de cuenta (`sk_live_...`, `sk_test_...`) opera sobre su propia cuenta y, con `X-ACCOUNT-ID`, sobre sus cuentas conectadas. La llave también fija el ambiente: una `sk_test_` solo lista y resuelve objetos de prueba (`live_mode: false`) y una `sk_live_` solo objetos reales. Un ID del otro ambiente responde `404` (`401` en `/customers`). Una llave de organización (`sk_org_live_...`, `sk_org_test_...`) alcanza todas las cuentas de una organización y solo sirve para leer: saldos, movimientos y reportes. Para operar sobre una cuenta debe nombrarla con `X-ACCOUNT-ID`; omitirlo en una lectura devuelve todas las cuentas de la organización. Cualquier otro endpoint responde `403` con `code: organization_key_unsupported`.

## Request

### Path parameters

- `id` (string, required) — ID de la suscripción

### Body (application/json)

This endpoint expects an object.

- `mode` (enum, optional) — Mismo significado que en `PUT /subscriptions/{id}`. `next_cycle` no genera prorrateo.
  - Allowed values: `next_cycle`, `now`, `now_and_charge`
- `items` (list of SubscriptionsIdProrationPreviewPostRequestBodyContentApplicationJsonSchemaItemsItems, optional) — Lista de cambios a previsualizar (mismo formato que en la actualización).

## Response

### 200

Estimación del prorrateo

- `net_amount_in_cents` (integer, optional) — Prorrateo neto en centavos. Positivo = cobro; negativo = crédito.
- `currency` (string, optional)
- `chargeable` (boolean, optional) — `true` si el neto puede cobrarse de inmediato (positivo y mayor al mínimo de la moneda).
- `lines` (list of SubscriptionsIdProrationPreviewPostResponsesContentApplicationJsonSchemaLinesItems, optional) — Desglose por producto (prorrateos positivos y créditos).

## Types

### SubscriptionsIdProrationPreviewPostRequestBodyContentApplicationJsonSchemaItemsItems

- `price_id` (string, optional)
- `product_id` (string, optional)
- `quantity` (integer, optional)
- `deleted` (boolean, optional)

### SubscriptionsIdProrationPreviewPostResponsesContentApplicationJsonSchemaLinesItems

- `description` (string, optional)
- `amount_in_cents` (integer, optional)

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "net_amount_in_cents": 4250,
  "currency": "GTQ",
  "chargeable": true,
  "lines": [
    {
      "description": "Prorrateo: Plan Pro",
      "amount_in_cents": 4250
    }
  ]
}
```

**SDK Code**

```python chargeable
import requests

url = "https://app.recurrente.com/api/subscriptions/id/proration_preview"

payload = {}
headers = {
    "X-SECRET-KEY": "<apiKey>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript chargeable
const url = 'https://app.recurrente.com/api/subscriptions/id/proration_preview';
const options = {
  method: 'POST',
  headers: {'X-SECRET-KEY': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go chargeable
package main

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

func main() {

	url := "https://app.recurrente.com/api/subscriptions/id/proration_preview"

	payload := strings.NewReader("{}")

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

	req.Header.Add("X-SECRET-KEY", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

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

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

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby chargeable
require 'uri'
require 'net/http'

url = URI("https://app.recurrente.com/api/subscriptions/id/proration_preview")

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

request = Net::HTTP::Post.new(url)
request["X-SECRET-KEY"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{}"

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

```java chargeable
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://app.recurrente.com/api/subscriptions/id/proration_preview")
  .header("X-SECRET-KEY", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php chargeable
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://app.recurrente.com/api/subscriptions/id/proration_preview', [
  'body' => '{}',
  'headers' => [
    'Content-Type' => 'application/json',
    'X-SECRET-KEY' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp chargeable
using RestSharp;

var client = new RestClient("https://app.recurrente.com/api/subscriptions/id/proration_preview");
var request = new RestRequest(Method.POST);
request.AddHeader("X-SECRET-KEY", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift chargeable
import Foundation

let headers = [
  "X-SECRET-KEY": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://app.recurrente.com/api/subscriptions/id/proration_preview")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```