Emitted when an MCP tool call is in progress.

interface ResponseMcpCallInProgressEvent {
    item_id: string;
    output_index: number;
    sequence_number: number;
    type: "response.mcp_call.in_progress";
}

Properties

item_id: string

The unique identifier of the MCP tool call item being processed.

output_index: number

The index of the output item in the response's output array.

sequence_number: number

The sequence number of this event.

type: "response.mcp_call.in_progress"

The type of the event. Always 'response.mcp_call.in_progress'.