Multisig Operations

Manage Safe wallet owners and threshold for multisig configuration.

Manage the multisig configuration of a Safe wallet: add or remove owners, and change the signature threshold.

All multisig operations use the two-step POST /v1.2/safes/operations → PUT /v1.2/safes/operations flow.

Add Owner

Add a new owner (signer) to the Safe and optionally update the threshold.

{
  "type": "ADD_OWNER",
  "owner": "0xNewOwnerAddress",
  "threshold": 2
}

Field	Type	Required	Description
`type`	string	Yes	Must be `"ADD_OWNER"`
`owner`	string	Yes	Address of the new owner to add
`threshold`	number	Yes	New signature threshold (minimum 1)

{
  "type": "REMOVE_OWNER",
  "owner": "0xOwnerToRemove",
  "threshold": 1
}

Field	Type	Required	Description
`type`	string	Yes	Must be `"REMOVE_OWNER"`
`owner`	string	Yes	Address of the owner to remove
`threshold`	number	Yes	New signature threshold after removal

{
  "type": "CHANGE_THRESHOLD",
  "threshold": 2
}

Field	Type	Required	Description
`type`	string	Yes	Must be `"CHANGE_THRESHOLD"`
`threshold`	number	Yes	New signature threshold (minimum 1)