Sign Message

Sign an arbitrary message with a Safe wallet (EIP-1271).

Sign a message using the Safe wallet. The signature is EIP-1271 compatible and can be verified on-chain.

Uses the two-step POST /v1.2/safes/operations → PUT /v1.2/safes/operations flow.

Operation Schema

{
  "type": "SIGN_MESSAGE",
  "message": "Hello, world!"
}

Field	Type	Required	Description
`type`	string	Yes	Must be `"SIGN_MESSAGE"`
`message`	string	Yes	The message to sign

After the operation completes, retrieve the userOpHash from the operation status and use it to verify the signature with VERIF_SIGNATURE.