Maximum builder fee

This API is in private preview. Target October 2026; timing is subject to change.

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

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

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.

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

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

Request