# Get a signed preview URL for an object

`GET /v1/admin/storage/buckets/{bucket}/objects/preview`

URL: https://docs.spacerun.co/docs/platform/reference/storage/previewStorageObject

- **Operation ID:** `previewStorageObject`
- **Tags:** Storage
- **Base URL:** `http://localhost:8787`

Returns a time-limited signed download URL (JSON); the object bytes themselves are served by Supabase Storage at that URL, not by this API. `expiresIn` is in seconds (60-86400, default 3600).

**Workflow:** [Integration guide](https://docs.spacerun.co/docs/platform/guides/uploads-and-media).

**Authentication:** staff Bearer JWT with permission `storage.read`.

## Authentication

- **Auth:** staff Bearer JWT (`Authorization: Bearer <access_token>`) with the permissions below.
- **Required permissions:** `storage.read`

## Parameters

| Name | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `bucket` | path | `string` | yes | One of: `"avatars"`, `"store"`, `"assets"` |
| `path` | query | `string` | yes | Min length: 1. Max length: 500 |
| `expiresIn` | query | `integer` | no | Default: `3600`. Min: 60. Max: 86400 |

## Responses

### 200

Signed download URL.

- Header `x-request-id`: Request identifier; quote it when reporting an error.
Content type: `application/json`

Schema: `object`

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `url` | `string` | yes | - |

## Errors

### 400

Request validation failed.

- Header `x-request-id`: Request identifier; quote it when reporting an error.
Content type: `application/json`

Schema: `object (ValidationErrorBody)`

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `success` | `boolean` | yes | One of: `false` |
| `error` | `object` | yes | - |
| `error.name` | `string` | yes | One of: `"ZodError"` |
| `error.issues` | `object[]` | yes | - |
| `error.issues[].code` | `string` | yes | - |
| `error.issues[].path` | `(string \| number)[]` | yes | - |
| `error.issues[].message` | `string` | yes | - |

**Request validation**

```json
{
  "success": false,
  "error": {
    "name": "ZodError",
    "issues": [
      {
        "code": "custom",
        "path": [
          "field"
        ],
        "message": "Invalid value"
      }
    ]
  }
}
```

### 401

Missing, malformed, expired or wrong-audience Bearer token (`missing_token`, `invalid_token`, `invalid_audience`).

- Header `x-request-id`: Request identifier; quote it when reporting an error.
Content type: `application/json`

Schema: `object (ErrorBody)`

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `error` | `string` | yes | Stable machine-readable error code, e.g. `forbidden`, `not_found`. |
| `details` | `any` | no | Optional structured context. For 403 it is `{ perm }`. |

**Error response**

```json
{
  "error": "missing_token"
}
```

### 403

Authenticated but lacking the required permission. `details.perm` lists the accepted permission keys.

- Header `x-request-id`: Request identifier; quote it when reporting an error.
Content type: `application/json`

Schema: `object (ErrorBody)`, fields as described above.

**Error response**

```json
{
  "error": "forbidden",
  "details": {
    "perm": "storage.read"
  }
}
```

### 500

Unexpected server error (`internal`). No details are returned.

- Header `x-request-id`: Request identifier; quote it when reporting an error.
Content type: `application/json`

Schema: `object (ErrorBody)`, fields as described above.

**Error response**

```json
{
  "error": "internal"
}
```

## Examples

### curl

```bash
curl -X GET 'http://localhost:8787/v1/admin/storage/buckets/avatars/objects/preview?path=example' \
  -H "Authorization: Bearer $ACCESS_TOKEN"
```

### TypeScript

```ts
const accessToken = process.env.ACCESS_TOKEN; // user JWT from your sign-in flow

const response = await fetch("http://localhost:8787/v1/admin/storage/buckets/avatars/objects/preview?path=example", {
  method: "GET",
  headers: {
    "Authorization": `Bearer ${accessToken}`,
  },
});
if (!response.ok) throw new Error(`HTTP ${response.status}: ${await response.text()}`);
const data = response.status === 204 || response.status === 205
  ? undefined
  : response.headers.get("content-type")?.includes("json")
    ? await response.json()
    : await response.text();
```