Sign a human-readable message with a wallet’s private key share via MPC.
For EVM wallets, the EIP-191 prefix (\x19Ethereum Signed Message:\n<length>)
is prepended and the result is keccak256-hashed before MPC signing. For Solana
and Cosmos wallets, the raw UTF-8 bytes of the message are signed directly.
The response signature is hex-encoded without a 0x prefix.
Your partner secret key (server-side only)
UUID for request tracing. Para returns one if omitted.
Wallet ID
"0a1b2c3d-4e5f-6789-abcd-ef0123456789"
Human-readable message to sign
"Hello World"
Signature
Hex-encoded signature without 0x prefix.
"a1b2c3d4e5f6..."