# IRPCWOPIOperationsPublic.GetActiveParticipants

Location: [gRPC API](https://developer.m-files.com/APIs/gRPC-API/index.md) > [Server integration API](https://developer.m-files.com/APIs/gRPC-API/integration/index.md) > [WOPI operations (anonymous)](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCWOPIOperationsPublic/index.md)

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

Badges: `Server integration API / specialized` `internal: not for applications` `write` `no session`

Lists the other users who currently have an open co-authoring session on the same file.

- **Service:** [WOPI operations (anonymous)](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCWOPIOperationsPublic/index.md) `MFiles.IRPCWOPIOperationsPublic`
- **gRPC method:** `/MFiles.IRPCWOPIOperationsPublic/GetActiveParticipants`
- **HTTP (mf-http-grpc):** `POST /grpc/v1/get-active-participants`
- **Request:** [`GetActiveParticipantsRequest`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCWOPIOperationsPublic/GetActiveParticipants/index.md#request)
- **Response:** [`GetActiveParticipantsResponse`](https://developer.m-files.com/APIs/gRPC-API/Reference/MFiles.IRPCWOPIOperationsPublic/GetActiveParticipants/index.md#response)
- **Book and level:** Server integration API, specialized
- **Kind:** write
- **Session:** Not needed: the call can be made before logging in.
- **Idempotent:** no
- **Returns metadata structure version:** no
- **Streaming:** none (unary)

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

## Remarks

**For M-Files components only.** M-Files clients call it during co-authoring. Applications should
not call it.
- Works only with a token of a co-authoring session; others fail with access denied.
- Lists the users of the unexpired WOPI user sessions on the same co-authoring link whose
  creating M-Files session is still valid, leaving out the user who created the link.

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

## Request: GetActiveParticipantsRequest

> 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 |
|---|---|---|
| `wopi_user_session_key` | `string` | The WOPI user session token. |

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

## Response: GetActiveParticipantsResponse

> 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 |
|---|---|---|
| `wopi_active_users[]` | repeated [`WOPIActiveUsers`](https://developer.m-files.com/APIs/gRPC-API/Reference/Messages/MFiles.WOPIActiveUsers/index.md) | The user names (`username`) of the participants. |
| `wopi_active_users[].username` | `string` | The Username of the user. |