CustomToolCallInputDeltaEvent Type | OpenRouter TypeScript SDK

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Event emitted when a custom tool call’s freeform input is being streamed. Mirrors response.function_call_arguments.delta but for custom tools whose input is opaque text rather than JSON arguments.

Example Usage

import { CustomToolCallInputDeltaEvent } from "@openrouter/sdk/models";

let value: CustomToolCallInputDeltaEvent = {
  delta: "<value>",
  itemId: "<id>",
  outputIndex: 992628,
  sequenceNumber: 0,
  type: "response.custom_tool_call_input.delta",
};

Fields

Field	Type	Required	Description
`delta`	string	:heavy_check_mark:	N/A
`itemId`	string	:heavy_check_mark:	N/A
`outputIndex`	number	:heavy_check_mark:	N/A
`sequenceNumber`	number	:heavy_check_mark:	N/A
`type`	”response.custom_tool_call_input.delta”	:heavy_check_mark:	N/A

TypeScript SDK

Call Model

DevTools

CustomToolCallInputDeltaEvent - TypeScript SDK

Example Usage

Fields

​Example Usage

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Example Usage

Fields