# Maximum builder fee

> HyperCore private-preview documentation.

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

<Callout intent="info">
  This API is in private preview. Target October 2026; timing is subject to change.
</Callout>


# Maximum builder fee

Returns the maximum builder fee a user approved for one builder.


<Note>

  **Available now.** This read is served at the interim endpoint today.

</Note>

## Request

`POST /{apiKey}/info`

| Parameter | Type   | Required | Description                    |
| --------- | ------ | -------- | ------------------------------ |
| `type`    | string | Yes      | Selects `maxBuilderFee`.       |
| `user`    | string | Yes      | Master or sub-account address. |
| `builder` | string | Yes      | Builder address.               |

```json
{
  "type": "maxBuilderFee",
  "user": "0x0000000000000000000000000000000000000000",
  "builder": "0x0000000000000000000000000000000000000000"
}
```

## Response fields

| Field      | Type    | Description                                                          |
| ---------- | ------- | -------------------------------------------------------------------- |
| `Response` | integer | Maximum builder fee in thousandths of a percent; `1` means `0.001%`. |

## Response example

```json
1
```