# IRPCThumbnails.GetThumbnailOptions

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Vault API](https://developer.m-files.com/APIs/gRPC-API/vault/index.md) > [Thumbnails](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCThumbnails/index.md)

HTML version: https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCThumbnails/GetThumbnailOptions/

Badges: `Vault API / standard` `read` `session` `idempotent` `returns metadata structure version`

Gets the vault's thumbnail settings.

- **Service:** [Thumbnails](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCThumbnails/index.md) `MFiles.IRPCThumbnails`
- **gRPC method:** `/MFiles.IRPCThumbnails/GetThumbnailOptions`
- **HTTP (mf-http-grpc):** `POST /grpc/v1/get-thumbnail-options`
- **Request:** [`GetThumbnailOptionsRequest`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCThumbnails/GetThumbnailOptions/index.md#request)
- **Response:** [`GetThumbnailOptionsResponse`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCThumbnails/GetThumbnailOptions/index.md#response)
- **Book and level:** Vault API, standard
- **Kind:** read
- **Session:** Required: the session ID from LogIn in the mfiles-session-id-bin metadata.
- **Idempotent:** yes
- **Returns metadata structure version:** yes (in the mfiles-metadata-version-bin trailer)
- **Streaming:** none (unary)

<a id="remarks"></a>

## Remarks

- Requires a vault session. No special vault rights are needed.
- `is_thumbnail_feature_on` false means that the server returns no classic thumbnails
  (`THUMBNAIL_STATUS_DO_NOT_GENERATE`) and clients should not create them either.
- `size` is the size of the classic thumbnails that the server generates, 256 x 256 pixels by
  default.
- `denied_file_extensions` lists the file extensions (without the dot) for which thumbnails
  must not be generated.

<a id="request"></a>

## Request: GetThumbnailOptionsRequest

No fields.

<a id="response"></a>

## Response: GetThumbnailOptionsResponse

> Nested message fields are expanded to depth 3; follow a type link for deeper levels and for the type's own page.

| Field | Type | Description |
|---|---|---|
| `pthumbops` | [`ThumbnailOptions`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ThumbnailOptions/index.md) | The thumbnail settings of the vault. See [ThumbnailOptions](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.ThumbnailOptions/index.md). |
| `pthumbops.is_thumbnail_feature_on` | `bool` | True if the whole Thumbnails feature is on. If off, neiher the server nor the client generates thumbnails. |
| `pthumbops.is_client_side_generation_on` | `bool` | True if the client-side thumbnail generation is on. If off, the server still generates thumbnails if bThumbnailFeatureOn is true. |
| `pthumbops.size` | [`Size`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.Size/index.md) | The size of thumbnails generated and cached by server. |
| `pthumbops.size.width` | `int32` |   |
| `pthumbops.size.height` | `int32` |   |
| `pthumbops.denied_file_extensions[]` | repeated `string` | An array of file extensions (not including dot) for which thumbnail generation is not allowed. |