> For a complete documentation index, fetch https://docs.voximplant.ai/llms.txt

# Client

## Methods

### addEventListener

Adds a handler for the specified [MCP.ServerEvents](/api-reference/voxengine/mcp/server-events) or `MCP.Events` event. Use only functions as handlers; anything except a function leads to the error and scenario termination when a handler is called.

```ts
addEventListener(event: MCP.Events | MCP.ServerEvents | T, callback: (event: MCP._ClientEvents[T]) => any): void
```

**Parameters**

**`event`** `MCP.Events | MCP.ServerEvents | T` — required

---

**`callback`** `(event: MCP._ClientEvents[T]) => any` — required

---

### callTool

Call a tool from the MCP server. [https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk@v1.5.0/mcp#CallToolParams](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk@v1.5.0/mcp#CallToolParams)

```ts
callTool(parameters: Object): void
```

**Parameters**

**`parameters`** `Object` — required

---

### close

Closes the connection (over WebSocket) or connection attempt.

```ts
close(): void
```

### id

Returns the Client id.

```ts
id(): string
```

### listTools

List the tools available from the MCP server. [https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk@v1.5.0/mcp#ListToolsParams](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk@v1.5.0/mcp#ListToolsParams)

```ts
listTools(parameters: Object): void
```

**Parameters**

**`parameters`** `Object` — required

---

### removeEventListener

Removes a handler for the specified [MCP.ServerEvents](/api-reference/voxengine/mcp/server-events) or `MCP.Events` event.

```ts
removeEventListener(event: MCP.Events | MCP.ServerEvents | T, callback?: (event: MCP._ClientEvents[T]) => any): void
```

**Parameters**

**`event`** `MCP.Events | MCP.ServerEvents | T` — required

---

**`callback`** `(event: MCP._ClientEvents[T]) => any`

---

### webSocketId

Returns the WebSocket id.

```ts
webSocketId(): string
```

> Note that the MCP.Client uses the [Model Context Protocol Go SDK v1.5.0](https://pkg.go.dev/github.com/modelcontextprotocol/go-sdk@v1.5.0).