## POST /api/v2/shared-hosting/{accountId}/actions/upgrade

**Change hosting plan**

Preview or commit a shared-hosting plan change. Send a catalog `productSlug` such as `webbhotell-business`; use `dryRun: true` first to preview the price change and `cancelExistingInvoice: true` to retry an existing-invoice conflict.

### Related Endpoints

- `GET /api/v2/shared-hosting/{accountId}/actions/upgrade`: List hosting upgrade options
- `GET /api/v2/shared-hosting/{accountId}/actions/sso`: Check control-panel SSO availability
- `POST /api/v2/shared-hosting/{accountId}/actions/sso`: Create hosting control-panel SSO link

### Headers

- `Accept`: application/json
- `Authorization`: Bearer YOUR_API_KEY
- Required API scope: `write:billing`
- `Content-Type`: application/json

### Parameters

- `accountId` (path, string, required): Public shared-hosting account ID. Get it from GET /api/v2/shared-hosting `data[].id`. Do not invent this value; use the exact ID returned by the referenced API response. Example: `acct_01hxa3b4c5d6e7f8g9h0j1k2m3`

### Request Body

- `productSlug` (string, required) Example: `webbhotell-business`
- `dryRun` (boolean, optional) Example: `true`
- `cancelExistingInvoice` (boolean, optional) Example: `false`

### Request Examples

#### Preview upgrade

```bash
curl -X POST "https://cloud.hostup.se/api/v2/shared-hosting/acct_01hxa3b4c5d6e7f8g9h0j1k2m3/actions/upgrade" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
    "productSlug": "webbhotell-business",
    "dryRun": true
  }'
```

```json
{
  "productSlug": "webbhotell-business",
  "dryRun": true
}
```

#### Commit upgrade

```bash
curl -X POST "https://cloud.hostup.se/api/v2/shared-hosting/acct_01hxa3b4c5d6e7f8g9h0j1k2m3/actions/upgrade" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
    "productSlug": "webbhotell-business"
  }'
```

```json
{
  "productSlug": "webbhotell-business"
}
```

#### Retry blocked change

```bash
curl -X POST "https://cloud.hostup.se/api/v2/shared-hosting/acct_01hxa3b4c5d6e7f8g9h0j1k2m3/actions/upgrade" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
    "productSlug": "webbhotell-business",
    "cancelExistingInvoice": true
  }'
```

```json
{
  "productSlug": "webbhotell-business",
  "cancelExistingInvoice": true
}
```

### Response Schema

- `preview` (boolean, required)
- `currentProduct` (object,null, required)
- `newProduct` (object,null, required)
- `priceChange` (object, required)
- `priceChange.amount` (number, required)
- `priceChange.recurringAmount` (number, required)
- `priceChange.currencyCode` (string, required)
- `priceChange.billingCycle` (string, required)

### Responses

#### 200 - Plan-change preview or result.
```json
{
  "upgraded": true,
  "currentProduct": {
    "slug": "webbhotell-start",
    "name": "Start"
  },
  "newProduct": {
    "slug": "webbhotell-business",
    "name": "Business"
  },
  "orderId": "ord_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "paymentInvoice": {
    "id": "inv_01hxa3b4c5d6e7f8g9h0j1k2m3",
    "number": "202600001",
    "amount": 100,
    "currencyCode": "SEK",
    "dueAt": "2026-05-27T00:00:00.000Z",
    "status": "unpaid",
    "paymentUrl": "/billing?invoice=202600001"
  },
  "renewalInvoice": null
}
```

#### 400 - Invalid request. The response body is an RFC 7807 Problem Details document.
```json
{
  "type": "https://developer.hostup.se/errors/invalid_request",
  "title": "Invalid request",
  "status": 400,
  "detail": "The request body failed validation.",
  "code": "invalid_request",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z",
  "errors": [
    {
      "pointer": "/items/0/domainName",
      "detail": "`domainName` is required.",
      "code": "invalid_request"
    }
  ]
}
```

#### 401 - Unauthorized. Authentication is required.
```json
{
  "type": "https://developer.hostup.se/errors/unauthorized",
  "title": "Unauthorized",
  "status": 401,
  "detail": "Authentication is required.",
  "code": "unauthorized",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z"
}
```

#### 403 - Forbidden. The caller lacks a required scope or does not own the resource.
```json
{
  "type": "https://developer.hostup.se/errors/forbidden",
  "title": "Forbidden",
  "status": 403,
  "detail": "The caller lacks a required scope or does not own the resource.",
  "code": "forbidden",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z"
}
```

#### 404 - Not found. The resource does not exist or is not owned by the caller.
```json
{
  "type": "https://developer.hostup.se/errors/not_found",
  "title": "Not found",
  "status": 404,
  "detail": "The requested resource could not be found.",
  "code": "not_found",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z"
}
```

#### 429 - Rate limited. Retry after the limit resets. 429 responses include `Retry-After` seconds plus `X-RateLimit-*` headers.
```json
{
  "type": "https://developer.hostup.se/errors/rate_limit_exceeded",
  "title": "Too many requests",
  "status": 429,
  "detail": "Too many requests. Retry after the limit resets.",
  "code": "rate_limit_exceeded",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z"
}
```

#### 500 - Internal error. Retry later or contact support if the issue persists.
```json
{
  "type": "https://developer.hostup.se/errors/internal_error",
  "title": "Internal server error",
  "status": 500,
  "detail": "An unexpected error occurred. Retry later or contact support if the issue persists.",
  "code": "internal_error",
  "instance": "/api/v2/resource",
  "requestId": "req_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "timestamp": "2026-04-27T12:34:56.000Z"
}
```