CustomToolCallItem Type | OpenRouter TypeScript SDK

The TypeScript SDK and docs are currently in beta. Report issues on GitHub.

A call to a custom (freeform-grammar) tool created by the model — distinct from function_call. Used for tools like Codex CLI’s apply_patch whose payload is opaque text rather than JSON arguments.

Example Usage

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

let value: CustomToolCallItem = {
  callId: "call-abc123",
  input: "*** Begin Patch\n*** End Patch",
  name: "apply_patch",
  type: "custom_tool_call",
};

Fields

Field	Type	Required	Description
`callId`	string	:heavy_check_mark:	N/A
`id`	string	:heavy_minus_sign:	N/A
`input`	string	:heavy_check_mark:	N/A
`name`	string	:heavy_check_mark:	N/A
`namespace`	string	:heavy_minus_sign:	Namespace qualifier for tools registered as part of a namespace tool group (e.g. an MCP server)
`type`	models.CustomToolCallItemType	:heavy_check_mark:	N/A

TypeScript SDK

Call Model

DevTools

CustomToolCallItem - TypeScript SDK

Example Usage

Fields

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Example Usage

Fields