---
title: "InvokeFunctionResponse"
description: "Response payload for a Function endpoint."
section: "Reference"
group: "Types"
order: 102
---

## Definition

```ts
interface InvokeFunctionResponse {
  ok: boolean;
  result: unknown;
  error: string | null;
  durationMs: number;
}
```

## Fields

| Field        | Type             | Notes                                                                            |
| ------------ | ---------------- | -------------------------------------------------------------------------------- |
| `ok`         | `boolean`        | `required` — True if the invocation completed without error.                     |
| `result`     | `unknown`        | `required` — Function return value; serialized as JSON. Null when `ok` is false. |
| `error`      | `string \| null` | `required` — Error message when `ok` is false; null otherwise.                   |
| `durationMs` | `number`         | `required` — Wall-clock duration of the invocation in milliseconds.              |